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MCAT Chemistry Question

What is the azimuthal quantum number (l) for the orbital to which a fluorine atom gains an electron to form an Fion?

A)    0

B)    1

C)    2

D)    3

 

MCAT Physics Problem

The voltage drop across Rd is 8 V. What is the current across Re?

a) 2 A

b) 8 A

c) 14 A

d) 32 A

 

MCAT Percentiles

Many students taking the MCAT are curious how their scores stack up against other applicants. Courtesy of AAMC data, here is the breakdown.

This data is taken from AAMC reports for 2012. (At time of writing, 2013 results weren’t yet complete).

MCAT Sample Question: Biology

In the ZW sex-determination system for birds, males (ZZ) are the homogametic sex while females (ZW) are the heterogametic sex. What is the most likely regulatory mechanism for the potential imbalance in gene expression between male and female birds?

A)    Post-transcriptional modification of half the male sex chromosomes gene products

B)    Inactivation of one Z chromosome in males

C)    Inactivation of the W chromosome in females

D)    Destruction of one Z chromosome in males

MCAT Sample Question — Chemistry

The combustion of octane is a common reaction in automobile engines.

1) 2 C8H18 (l) + 25 O2 (g) → 16 CO2 (g) + 18 H2O (g) ΔH1 = -250 kJ/mole

2) 18 H2O (l) → 18 H2O (g) ΔH2 = 88 kJ/mole

Net Reaction:

3) 2 C8H18 (l) + 25 O2 (g) → 16 CO2 (g) + 18 H2O (l) ΔH3 = ?

Given ΔH1 and ΔH2, what is ΔH3 for the net reaction above?

A. 163 kJ/mole

B. -163 kJ/mole

C. 338 kJ/mole

D. -338 kJ/mole

MCAT Biology Question — pH in the Stomach

The pH inside the stomach is very closely regulated. Which of the following is a major function for the pH in the stomach?

A)    Neutralizing the acidity of the chyme entering it

B)    Denaturing proteins to allow for digestive processes

C)    Activating trypsinogen into the active form

D)    Establishing a proton gradient for ATP production

MCAT Chemistry Question — Acid/Base Pairs

Which of the following acid/base pairs yields the most nearly neutral aqueous solution when mixed?

a) HCl/NaF

 b) H2CO3/2 NaOH

c) HCl/NaOH

d) HBr/NH3

 

MCAT Physics Question — Circuits

The circuit shown below consists of a capacitor, resistor, and battery with a switch that completes the circuit.

When the switch connects A to B, which of the following describes the conversion of energy that occurs as current flows through the circuit?

 

A)    Chemical to potential to thermal

B)    Chemical to electrical to thermal

C)    Electrical to chemical to thermal

D)    Potential to kinetic to electrical

MCAT Biology Question — Synapses

In order to send pain signals to the brain, a nerve in the spinal cord would have to synapse with an:

a) afferent dorsal motor neuron

b) efferent ventral sensory neuron

c) afferent dorsal sensory neuron

d) efferent ventral motor neuron

MCAT Chemistry Question — Temperature

Liquid Cesium (melting point 28ºC) is cooling from an initial temperature of 35ºC when the readings on the thermometer stop going down in temperature. What is probably observed when this takes place?

a) The temperature will slow its descent at 29ºC as the initial flakes of solid form and continue to drop to room temperature as the cesium becomes solid.

b) The temperature will stop decreasing and stay at 28ºC until the mass of cesium becomes solid.

c) The temperature slows at 32.5º C as solid flakes begin to form, halfway between the initial temperature and the melting point.

d) The temperature stops briefly at 28ºC, and the cesium solidifies once the temperature begins dropping again.

MCAT Physics Question — Water Pressure

A holding tank at sea level (atmospheric pressure 1.01 x 105 Pa) containing water has a pressure of 2 x 105 Pa at 10 m depth. What is the pressure in an equivalent holding tank containing mercury (specific gravity = 13) at 1 m depth in Denver, CO (atmospheric pressure 8.4 x 104 Pa)?

a) 2 x 105 Pa

b) 1 x 105 Pa

c) 1.4 x 106 Pa

d) 8.4 x 104 Pa

Formula for hydrostatic pressure in a fluid:

Ptot = P0 + ρgh

MCAT Biology Question — Lung Pressure

Prior to vaccinations for poliomyelitis, widespread polio infection created wards of patients at risk of death due to loss of control of respiratory muscles. In 1928,  Drinker and Shaw invented the first “iron lung,” a device that sealed the patient’s body from the neck down in a chamber with controllable pressure. The pressure change in the “iron lung” aided respiration by:

a) increasing the positive pressure in the lungs, driving diffusion of O2.

b) increasing the positive pressure in the lungs, thereby increasing lung ATP utilization efficiency.

c) increasing negative pressure within the iron lung caused the patient’s lungs to expand.

d) delivering positive abdominal pressure driving the diaphragm.

MCAT Chemistry Question — Pressure

Sodium nitrate and ammonium sulfate react at 230ºC to yield sodium sulfate, nitrous oxide, and water vapor. If the total pressure of the products is 1.8 atm, what is the partial pressure of the nitrous oxide?

The reaction is as follows:

2 NaNO3 + (NH4)2SO4 → Na2SO4 (aq) + 2 N2O (g)+ 4H2O (g)  (230—300° С)

a) 0.5 atm

b) 0.6 atm

c) 0.9 atm

d) 1.8 atm

MCAT Physics Question — Floating Objects

A 10-cubic-cm cork floats in water with 1/2 of its volume submerged. Approximately what fraction of the cork’s volume will be submerged when in mercury (specific gravity = 13)?

a) 1/20

b) 1/2

c) The cork will completely submerge because of the mercury’s greater cohesiveness than water.

d) 5/13

MCAT Chem Question — Empirical Formula

One mole of a compound consists of approximately 72g carbon and 6g hydrogen. What is its empirical formula?

a) C6H6

b) CHO

c)  CH

d) C6H12

MCAT Biology Question — Infection

An infectious agent is probably a virus instead of a bacterium if it:

a) lacks membrane-bound organelles

b) cannot reproduce in acellular culture

c) has a length of 1μm, about the size of a mitochondrion

d) contains DNA

MCAT Chemistry Question — Electrons

In the Bohr model of the atom, electrons jump to a higher energy orbital when:

a) sufficient energy is absorbed

b) their spin coefficient increases sufficiently

c) they move to a smaller radius orbital

d) photons are given off

MCAT Physics Question — Fundamental Wavelength

The fundamental wavelength of a standing wave in a 1 meter long pipe, if the pipe has one open end and one closed end is:

a) 4m

b) 1m

c) 2m

d) 4/3m

MCAT Chemistry Question — Phase Change

Which phase change has the same magnitude of energy to the heat of vaporization for water?

a) sublimation

b) freezing

c) condensation

d) deposition

MCAT Biology Question — Aldosterone

Aldosterone acts on the kidney by:

a) increasing water permeability of the collecting duct

b) increasing water permeability of the ascending limb of the loop of Henle

c) increasing water permeability in the proximal tubule

d) increasing sodium absorption and potassium secretion in the distal tubule

MCAT Physics Question — pH

A NaOH solution has an  OH concentration of 1×10-5M. What is the pH of the solution?

a) 2

b) 5

c) 9

d) 12

MCAT Biology Question — Hormones

The hormones involved with menstruation associated with 1) the hypothalamus, 2) the anterior pituitary, and 3) the ovaries are (in order):

a) 1) LH and FSH, 2) GnRH, 3) estrogen and progesterone

b) 1) GnRH, 2) cortisone and aldosterone, 3) LH and FSH

c) 1) GnRH, 2) LH and FSH, 3) estrogen and progesterone

d) 1) LH and FSH, 2) GnRH, 3) cortisone and aldosterone

MCAT Physics Question — Waves

Small waves of water in the ocean transfer:

a) energy

b) sonic heat

c) neither energy nor water mass

d) sound waves only

MCAT Chemistry Question — Oxygen

What are the formal charges on oxygen A, carbon, and oxygen B in this resonance structure of CO2?

a) -1, 0, -3

b) +2, 0, +2

c) +1, 0, -1

d) +5, +4, +7

How to Excel During Your Medical School Admissions Interview

Today’s guest post is from Next Step Test Preparation partner MedSchoolCoach. MedSchoolCoach provides comprehensive medical school admissions consulting, including medical school interview preparation.

 The medical school interview is an important part of the admissions process. We wanted to share with you what some of your specific goals should be going into the interview. These may sound similar to the personal statement goals but the approach towards achieving them will be different.

Sell Yourself

Your main goal should always be kept in mind whenever you are answering questions during the interview. You want to make sure that you are always portraying to the interviewer that you will be a vital, hardworking, diverse, unique incoming student that will go on to accomplish accolades in your future profession as a physician. However, you have to be doing this in a way that makes you seem humble and eager to work with others. Even more, the best way to describe all these things is through stories and “showing” your true personality during the interview. Sound difficult? Well that’s what practice is for.

Tell Them Why You Want To Go Into Medicine

Often the first question and one that will most likely come up during interviews is the question about “why you want to be a doctor?” Even though it’s been written about in personal statements, that you have spent 4+ years working towards this goal, you still need to provide a convincing, personal story that persuades the interviewer that you know exactly what you are getting into and that you still want to do medicine.

Make it a Conversation

The best medical school interviews are the one that don’t feel forced—they feel like a conversation between an old friend you are catching up with. While it may be difficult to get to this point, with practice and preparation, it should be easy to get to providing answers and make a conversation flow and seem natural.

Be Memorable

This is perhaps the hardest part of the entire medical school interview. A lot of medical students are generic. They have volunteered in hospitals, shadow doctors, done a little bit of research and in general are good people. However in order to separate yourself you really need to make your interview memorable. The easiest way to do this is to have a pleasant and fun conversation with your interviewer. If you talk the entire time about your interviewers favorite sports team or their hobby of photography which you share that makes a better interview than talking solely about the time you pushed a patient around in a stretcher at the hospital. Remember faculty members and students on the admissions committee want to be your advocate and the easiest way to get them there is to get along with them well.

Be Normal

This cannot be stressed enough. If you are a naturally a person who is easy to have a conversation with, the interview will go really well for you. This is actually a point we like to stress because it means that if you can relax a little bit, if you consider yourself a normal person. That said, read on to make sure you make no mistakes.

Be Yourself

You should always be yourself above all else. Unless you are not normal, in which case, please, just act normal.

Sahil Mehta MD is a physician and the founder of MedSchoolCoach, the nation’s leading medical school admissions consulting company. MedSchoolCoach offers extensive medical school interview preparation.

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MCAT Biology Question — Joints

Which of the following best describes the elbow joint in a human?

A) Gliding joint
B) Ball and socket joint
C) Hinge joint
D) Saddle joint

MCAT Sample Question — Physics

Ions X, Y, and Z are initially held fixed in the orientation shown below:


Which of the following vectors corresponds to the direction ion Z will move immediately after it is released from its fixed position?

MCAT Chemistry Question — Molar Heat Capacities

The molar heat capacities (J/mole ŸK) for zinc, copper, silver, and gold is 25.2, 24.5, 24.9, and 25.6, respectively. If 1 mole of each substance is heated until the temperature increases by 10K, which metal required the addition of the most heat?

  1. Zinc
  2. Copper
  3. Silver
  4. Gold

MCAT Organic Chemistry Question — Carbohydrates

Alpha and beta carbohydrates are determined by the position of the hydroxyl group attached to the anomeric carbon. Which of the following molecules is a β-carbohydrate?

 

MCAT Biology Question — Sperm Development

In which of the following structures of a healthy human male would immotile sperm incapable of fertilization be found?

 

  1. Vas deferens
  2. Seminiferous tubules
  3. Urethra

 

A)   I only

B)   II only

C)   I and II

D)   I, II, and III

MCAT Chemistry Question — Solutions

Mg(OH)2 is slowly dissolved in 500 mL of 25oC water until the solution becomes fully saturated. Which of the following occurs when 10.0 mL of 0.1 M HCl is added?

A. MgCl2 precipitates

B. Mg(OH)2 precipitates

C. Ksp for Mg(OH)2 increases

D. [H2O] increases

MCAT Biology Question — Dehydration & Starvation

A person suffering from severe dehydration and starvation would NOT be expected to have elevated plasma concentrations for which of the following hormones?

 

A)   ADH

B)   Cortisol

C)   Aldosterone

D)   Insulin

MCAT Physics Question — Snell’s Law

A beam of light is traveling through air (n = 1) when it passes through a transparent glass (n = 1.5) medium. Which of following is true concerning the angles θ and the velocity V?

  1. θ1 > θ2 and V1 > V2
  2. θ1 > θ2 and V1 < V2
  3. θ1 < θ2 and V1 > V2
  4. θ1 < θ2 and V1 < V2

MCAT Chemistry Question — Chemical Reactions

The combustion of glucose, a six-carbon sugar, is represented by the following balanced reaction:

 

C6H12O6 + 6 O2 → 6 CO2 + 6 H2O

 

If a reaction vessel initially contains 360 grams of C6H12O6 (MW = 180 g/mole), and if the reaction produces 440 grams of CO2, what is the limiting reagent?

 

A. C6H12O6

B. O2

C. CO2

D. H2O

MCAT Biology Question — Nucleotide Structures

DNA and RNA are composed of long chains of monomers known as nucleotides. On the guanine molecule shown below, which arrow best indicates the 5’ end of the subunit?

 

 

  1. I
  2. II
  3. III
  4. IV

MCAT Chemistry Question — Vaporization

All of the following are true regarding the vaporization of water EXCEPT:

  1. the velocity of the gas molecules increase
  2. the system’s entropy increases
  3. the products have more kinetic energy
  4. the intramolecular forces of water are broken

MCAT Biology Question — Phenotypes

Myoclonic epilepsy and ragged-red fiber (MERRF) is an extremely rare disorder that affects neuromuscular systems. MERRF results from a mutation in mitochondrial DNA (mtDNA) that impairs protein synthesis, oxygen consumption, and energy production. When an affected male and a normal female reproduce, which of the following best predicts the expected phenotypic ratios of the offspring?

 

  1. None of the offspring will be affected
  2. All males and no females will be affected
  3. Half of males and half of females will be affected
  4. One-fourth of the offspring will be affected

MCAT Organic Chemistry Question — TLC

Thin-layer chromatography (TLC) is a laboratory technique used to separate non-volatile mixtures. Using a silica gel plate and a hexane solvent, which of the following compounds in a mixture containing CH3OH, HCOOH, CH2O, and C6H6 would have the highest Rf value?

 

  1. C6H6
  2. HCOOH
  3. CH2O
  4. CH3OH

MCAT Biology Question — Genotypes

What proportion of offspring with the genotype AABBCC will result from a trihybrid cross for the unlinked genes A, B, and C?

 

  1. 1/8
  2. 1/16
  3. 1/32
  4. 1/64

MCAT Chemistry Question — Gas Behavior

A 2 L sealed vessel contains 2 moles of nitrogen gas at 0oC. All of the following will decrease the pressure inside the vessel EXCEPT:

  1. nitrogen leaking out of the tank
  2. decreasing the temperature of the gas
  3. expanding the volume to 3 L
  4. replacing 1 mole of nitrogen gas for 1 mole of oxygen gas

 

MCAT Physics Question — Magnification & Distance

A woman stands 1m in front of a plane mirror. What is the magnification and distance from the woman to her mirror-image?

  1. 1/2 and 2m
  2. 1 and 1m
  3. 2 and 1m
  4. 1 and 2m

 

MCAT Chemistry Question — Nernst Equation

The voltage of a galvanic cell, E, depends on the concentration of reactants and products. The Nernst equation,

E = Eo – (0.0592/n)log(Q)

can be used to calculate the cell potential. Eo is the standard cell potential, n is the number of moles of electrons exchanged in the reaction, and Q is the reaction quotient. Which of the following is true regarding the value of E?

 

A. E is always less than Eo

B. E is always greater than Eo

C. E is always equal to Eo

D. E can be less than, greater than, or equal to Eo

 

MCAT Organic Chemistry Question — Amine Molecules

Which of the following, heterocyclic amine and/or secondary amine, best describes the molecule shown below?

  1. Heterocyclic amine only
  2. Secondary amine only
  3. Both heterocyclic amine and secondary amine
  4. Neither heterocyclic amine nor secondary amine

MCAT Biology Question — Color Blindness

Color blindness (B) is a recessive (b) sex-linked disorder that results from a mutation on the X chromosome. What would be the most likely phenotypes of the male and female progeny when a colorblind man and a woman with no family history of color blindness mate?

 

  1. All of the male and none of the female offspring will be colorblind
  2. Half of the male and half of the female offspring will be colorblind
  3. None of the male and none of the female offspring will be colorblind
  4. None of the male and all of the female offspring will be colorblind

 

MCAT Chemistry Question — Ionic Bonds

Which of the following pure compounds form ionic bonds?

 

  1. CaCl2
  2. HCl
  3. NaF
  4. Mg(OH)2

 

  1. I  only
  2. I and II only
  3. I, III, and IV
  4. I, II, III, and IV

MCAT Chemistry Question — Electronegativity

The electronegativity of elements increases going from left to right across a row in the periodic table. Which of the following best accompanies this trend in the periodic table?

 

  1. A decrease in ionization energy and an increase in atomic radii
  2. A decrease in atomic radii and a decrease in ionization energy
  3. An increase in ionization energy and a decrease in atomic radii
  4. An increase in ionization energy and an increase in atomic radii

MCAT Biology Question — Muscle Types

Mono-nucleated muscle cells are a predominant muscle fiber found in all of the following EXCEPT:

 

  1. the stomach
  2. the pharynx
  3. the heart
  4. the lungs

MCAT Chemistry Question — Oxidation

What is the oxidation state of chromium in the dichromate ion, Cr2O72-?

 

  1. -2
  2. 0
  3. +6
  4. +12

 

MCAT Chemistry Question — Alkali Metals

Similarities in chemical behavior can be observed between elements within the same family in the periodic table. For instance, sodium and potassium react with oxygen to produce a metal oxide. Which of the following gives the balanced reaction for the oxidation of an alkali metal (M)?

 

  1. 2M(s) + O2(g) → 2MO(s)
  2. 4M(s) + O2(g) → 2M2O(s)
  3. 3M(s) + O2(g) → M3O2(s)
  4. M(s) + O2(g) → MO2(s)

MCAT Biology Question — ADH Hormone

Antidiuretic hormone (ADH) is responsible for the retention of water in the body. In the kidney, ADH increases reabsorption at the collecting duct. Which of the following physiological responses will be most likely in a patient suffering from severe dehydration?

 

  1. Decreased secretion of ADH resulting in decreased blood volume
  2. Increased secretion of ADH resulting in decreased blood volume
  3. Decreased secretion of ADH resulting in increased blood volume
  4. Increased secretion of ADH resulting in increased blood volume

 

MCAT Physics Question — Wave Speed

A wave at Waimea Bay, Hawaii, has a speed of 6 m/sec when it starts to break. If 6 waves break each minute, what is the distance from the wave’s crest to its trough?

 

  1. 0.5m
  2. 1m
  3. 30m
  4. 60m

 

MCAT Chemistry Question — Molecular and Empirical Formulas

One mole of an unknown compound is determined to have a molecular weight of 86 grams per mole. The mass percent of the compound is as follows: 55.81% carbon, 6.98% hydrogen, and 37.21% oxygen. What is the empirical formula and molecular formula, respectively, of the unknown compound.

 

  1. C2H3O and C4H6O2
  2. C2H3O and C6H9O3
  3. C5H8O and C5H8O
  4. C5H8O and C10H16O2

MCAT Biology Question — Protein Synthesis

Initiation of protein synthesis begins on which of the following sites?

 

  1. Free-standing ribosomes
  2. Rough endoplasmic reticulum
  3. Golgi apparatus

 

  1. I only
  2. II only
  3. I and II
  4. I, II, and III

MCAT Physics Question — Frequency

A man drives a go-kart around a circular track with a diameter of 50 m, at a rate of 314 m/minute. What is the frequency at which he circles the track in hertz (Hz)?

 

  1. 0.0027 Hz
  2. 0.03 Hz
  3. 2 Hz
  4. 6.25 Hz

MCAT Chemistry Question — Alkali Metals & Water

The alkali metals (M) are a highly reactive group of elements that react with water according to the following reaction:

 

2M(s) + 2H2O(l) → 2MOH(aq) + H2(g)

Which of the following alkali metals will react the most violently with water?

 

  1. Sodium
  2. Magnesium
  3. Zinc
  4. Cesium

MCAT Biology Question — Metabolic Energy

Which of the following molecules will stop being produced first when oxygen is no longer supplied to the cell?

 

  1. Oxaloacetate
  2. Pyruvate
  3. Water
  4. Adenosine triphosphate

MCAT Physics Question — Half Life

If the half-life of carbon-14 is 5700 years, and some plant remains from an archeological dig site have 1/8 the carbon-14 found in the atmosphere, what is the approximate age of the remains in the dig site in years?

 

  1. 700
  2. 5700
  3. 17000
  4. 45000

 

MCAT Chemistry Question — Rate Law

The reaction A + B → C proceeds at a rate that varies with the initial concentration of the reactants, as follows:

 

Trial

[A]t=0

[B]t=0

Rate t=0 (M/s)

1

0.1 M

0.5 M

5 x 10-4

2

0.2 M

1.0 M

1 x 10-3

3

0.1 M

4.0 M

4 x 10-3

 

What is the rate law for the reaction above?

 

  1. Rate = k[A]
  2. Rate = k[B]
  3. Rate = k[A][B]
  4. Rate = k[A][B]2

MCAT Physics Question — Fluid Dynamics

Assuming the circulatory system in humans obeys Bernoulli’s principle of fluid dynamics, which of the statements most accurately compares the blood pressure in a capillary of the neck to a capillary with an equal cross-sectional area in the right knee?

 

  1. The pressure in the neck is greater than the pressure in the knee because of the increase in pressure head
  2. The pressure in the neck is equal to the pressure in the knee because of the equal dynamic pressure according to the continuity equation
  3. The pressure in the knee is greater than the pressure in the neck because of the increase in pressure head
  4. An accurate comparison cannot be given without knowledge of the fluid’s density and viscosity

MCAT Biology Question — Oogenesis

Between fertilization and birth, a female germ cell begins oogenesis to produce a primary oocyte. Which of the following stages is the primary oocyte arrested in until puberty?

  1. Prophase I
  2. Anaphase I
  3. Prophase II
  4. Anaphase II

 

MCAT Chemistry Question — Standard Free Energy

Which of the following statements most accurately describes the cell potential (Eo), change in Gibb’s free energy (ΔGo), and equilibrium constant (K) for a non-spontaneous chemical reaction?

 

  1. Eo < 0, ΔGo > 0, K < 1
  2. Eo < 0, ΔGo < 0, K < 1
  3. Eo > 0, ΔGo < 0, K > 1
  4. Eo > 0, ΔGo > 0, K > 1

MCAT Biology Question — Meiosis and Mitosis

Which of the following phases are common to cells undergoing meiosis and mitosis?

  1. G0 phase
  2. G2 phase
  3. S phase

 

  1. I only
  2. I and II only
  3. II and III only
  4. I, II, and III

MCAT Physics Question — Prisms

Which of the following diagrams accurately illustrates the pathway of light through the prism given that the prism has a lower refractive index than the surrounding fluid?

 

 

MCAT Biology Question — Skin

Human skin serves which of the following functions?

 

  1. Innate immunity
  2. Production of the inactive form of vitamin D
  3. Thermoregulation

 

  1. I only
  2. I and III only
  3. II and III only
  4. I, II, and III

 

MCAT Chemistry Question — Reduction & Oxidation

What is the identity of the reducing agent and oxidizing agent, respectively, in the reaction shown below?

2Cr(OH)3 + 3H2O2 + 4NaOH → 2Na2CrO4 + 8H2O

  1. Cr(OH)3  and NaOH
  2. Cr(OH)3 and H2O2
  3. H2O2 and Cr(OH)3
  4. H2O2 and NaOH

MCAT Physics Question — Sound Level

The sound level can be determined using the equation, dB = 10log10(I/Io), where dB is the sound level measured in decibels, I is the intensity of the sound measured in W/m2, and Io (W/m2) is the threshold of hearing in a healthy human. How many orders of magnitude greater is the intensity of sound measured at 120 decibels compared to a sound of 40 decibels?

 

  1. 2
  2. 8
  3. 12
  4. 80

MCAT Biology Question — Predominate Structures

Glycine is an achiral amino acid with pKa values of 2.34 and 9.60. Which of the following is the predominant structure of glycine at a physiological pH?

 

 

MCAT Chemistry Question — Aqueous Solution Boiling Point

Which of the following aqueous solutions will have the highest boiling point?

 

  1. 0.10 m Na3PO4
  2. 0.15 m NaCl
  3. 0.20 m HF
  4. 0.30 m CH3OH

MCAT Biology Question — Male Gamete Pathway

Which of the following is the pathway of the male gamete from production in the testis to ejaculation?

 

  1. Seminiferous tubules, epididymis, vas deferens, ejaculatory duct, urethra, penis
  2. Seminiferous tubules, ejaculatory duct, vas deferens, epididymis, urethra, penis
  3. Epididymis, seminiferous tubules, vas deferens, ejaculatory duct, urethra, penis
  4. Epididymis, seminiferous tubules, ejaculatory duct, vas deferens, urethra, penis

MCAT Physics Question — Projectile Motion

Which of the following accurately compares the final velocity (vf) and acceleration (af) of an object as it strikes the ground after being launched with a velocity (v) from a platform 10 meters above than the striking surface?

 

  1. |af| > |a| and |vf| > |v|
  2. |af| < |a| and |vf| < |v|
  3. |af| = |a| and |vf| > |v|
  4. |af| = |a| and |vf| < |v|

MCAT Biology Question — Cell Size

The size of a cell is least dependent on which of the following?

 

  1. Intracellular solute concentration
  2. Surface area to volume ratio
  3. Resting membrane potential
  4. Extracellular solute concentration

MCAT Chemistry Question — Gas

The behavior of gas will deviate from ideal behaviors LEAST under which of the following sets of conditions:

 

  1. A gas at high pressure and temperature
  2. A gas at low pressure and temperature
  3. A gas at high pressure and low temperature
  4. A gas at low pressure and high temperature

MCAT Biology Question — Behavior Science

Immediately after hatching, precocial birds, such as ducks or geese, are born with open eyes and the ability to walk. The hatchlings follow the first thing they see, which is typically their parent. A behavioral scientist studying this phenomenon observes the birth of a precocial bird, which immediately began to follow the scientist. Which of the following concepts best describes this behavior?

 

  1. Conditioning
  2. Imprinting
  3. Innate inheritance
  4. Parental misrecognition

MCAT Chemistry Question — Negative Slope

Which of the following best accounts for the negative slope of the liquid-solid equilibrium line in the phase diagram for water?

 

  1. H2O(s) has a greater density than H2O(l), which causes the solid to form liquid under high pressure conditions.
  2. H2O(s) has a greater density than H2O(l), which results from the hydrogen bonds formed between water molecules.
  3. H2O(s) has a lower density than H2O(l) which results from the crystalline framework that forms due to hydrogen bonds.
  4. H2O(s) has a lower density than H2O(l) which causes the solid to form liquid under low pressure conditions.

 

MCAT Biology Question — Virus vs. Bacterium

An infectious agent is probably a virus instead of a bacterium if it:

 

  1. Lacks membrane-bound organelles
  2. Cannot reproduce in acellular culture
  3. Has a length of 1μm, about the size of a mitochondrion
  4. Contains DNA

MCAT Physics Question — Absolute Pressure

What is the ratio of the ratio of the absolute pressure at point A compared to point B if the open container shown below is filled with water?

 

 

A. Pb = 2Pa

B. Pb = 3Pa

C. Pb = 4Pa

D. Pb = 5Pa

 

MCAT Chemistry Question — Nitrous Oxide

Amateur chemists make nitrous oxide at home using this (unbalanced) reaction:

How many grams of NH4NO3 are required to produce 134.4 L of mixed gas if products are at STP?

(Do NOT heat the ammonium nitrate above 240°C or it may detonate)

 

  1. 160
  2. 240
  3. 960
  4. 1440

MCAT Chemistry — KNO3

What is the effect of adding KNO3 to a saturated aqueous solution of KCl?

 

  1. Ksp increases because more K+ ions are present.
  2. Ksp decreases because NO3 ions displace Cl ions.
  3. The concentration of Cl ions decreases because KNO3 addition drives KCl dissociation towards the solid, undissociated form.
  4. More KCl dissolves because more aqueous K+ ions require more Cl ions.

 

MCAT Biology Question — Aldosterone Action

Aldosterone acts on the kidney by:

 

  1. increasing water permeability of the collecting duct
  2. increasing water permeability of the ascending limb of the loop of Henle
  3. increasing water permeability in the proximal tubule
  4. increasing sodium absorption and potassium secretion in the distal tubule

MCAT Physics Question — Atmospheric Pressure

What is the atmospheric pressure at the top of Mount Everest, which stands approximately 9000 meters above sea level? (Assume an average air density = 0.8 kg/m3 and g = 10 m/s2)

 

  1. 7200 Pa
  2. 29000 Pa
  3. 72,000 Pa
  4. 101,000 Pa

 

MCAT Chemistry Question — Butane

Which of the following characterizes butane?

 

  1. high solubility in water
  2. strong dipole moment
  3. high molecular weight
  4. low solubility in water

MCAT Biology Question — Viruses

While viruses are incredibly simple structures composed of little more than a protein coat and some DNA, some viruses require enzymes to be packaged in with their genetic material. Human immunodeficiency virus (HIV) is an example of a retrovirus. In HIV, which of the following proteins must be packaged in with its nucleic acids in order to reproduce successfully?

 

A) DNA polymerase

B) Helicase

C) Reverse transcriptase

D) None of the above; HIV can utilize its host cell for all of the proteins or enzymes it needs.

 

MCAT Biology Question — Incomplete Dominance

The snapdragon is a plant demonstrating incomplete dominance in the flower color phenotype. If homozygous snapdragons have either red or white flowers, what color are the heterozygotes?

 

A) red, because the white coloring reflects all incoming light wavelengths in flowers expressing both red and white alleles

 

B) some flowers red and some white, because only one gene can be expressed at a time

 

C) white, because the white coloring will reflect all incoming light wavelengths in flowers expressing both red and white alleles

 

D) pink, because it is in-between red and white

 

MCAT Chemistry Question — Methyl Propanoate

What is the structure of methyl propanoate?

 

A) CH3COCH2CH3

 

B) CH3COOCH3

 

C) CH3CH2COOCH3

 

D) CH3CHOCH2CH3

 

MCAT Physics Question — Entropy Change

At atmospheric pressure, carbon dioxide undergoes sublimation at -109.5°F. How does the entropy change when CO2 undergoes deposition?

 

A) ΔS>0

 

B) ΔS<0

 

C)  ΔS=0

 

D) cannot be determined

 

MCAT Biology Question — Cellulose

Although linked at the same carbons as starch and glycogen, cellulose is indigestible to humans. This is a result of the:

 

  1. alpha-linkage from carbons 2 to 6 of D-glucose.
  2. beta-linkage at carbons 2 to 6 of D-glucose.
  3. alpha-linkage at carbons 1 to 4 of D-glucose.
  4. beta-linkage at carbons 1 to 4 of D-glucose.

 

MCAT Organic Chemistry Question — IUPAC

What is the IUPAC name of the following compound: (CH3)2CH-NH-CH-(CH3)2?

 

  1. Diisopropylamine
  2. Diisobutylamine
  3. Di-tert-propylamine
  4. 1,1-dimethylethylamine

 

MCAT Biology Question — Biological Classification

One species of chimpanzee is biologically classified as : Animalia, Chordata, Mammalia, Primates, Homonidae, Pan, Pan paniscus. Man is biologically classified as: Animalia, Chordata, Mammalia, Primates, Homonidae, Homo, Homo sapiens. Which is the most specific taxonomic category shared by man and chimpanzees?

 

  1. order
  2. class
  3. family
  4. phylum

 

MCAT Organic Chemistry Question — Chemical Species

 

The molecule above is sent through a mass spectrometer. Which of the following is the chemical species represented by a peak at m/z 43?

 

A) methyl carbocation

B) ethyl carbocation

C) propyl carbocation

D) butyl carbocation

MCAT Chemistry Question — Standard State Cell Potential

The standard reduction potentials for Zn and Cu are given below:

 

Zn2+(aq) + 2e → Zn(s) E°= -0.76 V

Cu+(aq) + e–  → Cu(s)  E°= 0.52 V

 

What is the standard state cell potential for the following reaction?

 

Zn(s) + 2Cu+(aq) → Zn2+(aq) + 2Cu(s)

 

  1. -1.8V
  2. -1.28V
  3. 0.28V
  4. 1.28V

MCAT Physics Question — Pitch

A punk-rocker walks by a listener with a portable stereo playing music at full volume. The pitch of the recording will seem lower:

 

I. as the punk-rocker moves away from the listener.

II. as the listener moves away from the punk-rocker.

III. under no circumstances, as the pitch of the recording is fixed when the recording is made.

 

  1. I only
  2. II only
  3. I and II only
  4. III only

MCAT Biology Question — Genetic Information

Which term describes exchange of viral and/or bacterial genetic information from one cell to another via a viral bacteriophage vector?

a) transformation

b) translocation

c) transduction

d) transcription

 

MCAT Biology Question — Digestive System

In the digestive system, triglycerides interact with amphipathic:

a) pepsin

b) bile salts

c) glycogen

d) sphingomyelin

MCAT Chemistry Question — Hydrogen Bonds

In comparison with 1,2-dihydroxyethane, ethanol has weaker intermolecular hydrogen bonds resulting in:

a) a lower boiling point for ethanol due to weaker intermolecular forces.

b) ethanol being a stronger base.

c) a higher boiling point because ethanol is a higher molecular weight compound than 1,2-dihydroxyethane.

d) weaker intramolecular bonds in ethanol due to overall reduced bonding energy.

MCAT Physics Question — Phase Changes

Carbon dioxide at -20°C is pressurized at 100 atm. If the CO2 undergoes isobaric cooling to -65°C followed by isothermal depressurization to 1 atm, what are the original phase and subsequent phase(s) of the CO2?

a) liquid, gas, solid

b) gas, solid

c) liquid, gas

d) liquid, solid, gas

MCAT Biology Question — Digestive Tract

Digestion requires exposure of lumen contents to the inner surface of the digestive tract. The inner surface of the digestive tract is increased in surface area by:

a) relaxation of the pyloric sphincter

b) stomach mucosal cells

c) villi and convolutions

d) absorptive flagella

MCAT Physics Question — Positive Charges

A mobile positive charge Qa is placed a distance “d” from a fixed positive charge Qb of equal magnitude. When released from rest, the positive charge Qa will:

a) accelerate away from Qb.

b) circle Qb along an equipotential electric field line.

c) accelerate towards Qb.

d) remain in place while doubling the electrical potential at a point located at d/2 between the charges.

MCAT Biology Question — Stable Expression of Traits

Stable expression of harmful recessive traits across generations most likely occurs in populations with a high level of:

a) emigration

b) natural selection

c) inbreeding

d) random mating

MCAT Chemistry Question — Ideal Gases

If a gas occupies 0.1L at 200atm, what will its volume be at 1atm?

a) slightly less than 20L

b) 20L

c) slightly more than 20L

d) 2000L

MCAT Physics Question — Buoyant Force

A baseball that lands in a lake (water) experiences a buoyant force of approximately 2N while submerged. A baseball’s mass is specified as 142-149g, or 5-5¼ oz., according to the official rules of baseball. What is the specific gravity of bromine if the same baseball experiences a buoyant force of 6.2N while submerged after landing in an open vat of liquid bromine at a nearby chemical factory?

a) 1.5

b) 3.1

c) 4

d) 40

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