October 31, 2014
The following is a phase diagram showing the transition from solid to gas as heat is added to a substance:
Which of the following correctly indicates the relationship between the regions of the graph and the corresponding phases:
A) 1: solid, 2: phase change from solid to liquid, 5: gas
B) 2: solid, 3: phase change from solid to liquid, 4: liquid
C) 1: phase change from solid to liquid, 4: gas
D) 1: solid, 2: phase change from liquid to gas, 3: liquid
October 30, 2014
An ideal gas at STP occupies 0.03L and has a mass of 0.002g. Which of the following gives the correct expression for the molar mass of the gas?
A) 22.4 x 0.03 / 0.002
B) 0.03 x 0.002 / 22.4
C) 22.4 x 6.02 x 1023 / 0.002
D) 22.4 x 0.002 / 0.03
October 29, 2014
Which of the following correctly indicates stages in the development of a plasma cell the location where those stages occur:
A) bone marrow: B-cell, lymph node: plasma cell
B) bone marrow: T-cell, thymus: plasma cell
C) lymph node: B-cell, bone marrow: plasma cell
D) thymus: T-cell, lymph node: plasma cell
October 28, 2014
A student observes that mercury forms a convex meniscus in the graduated cylinder but that water forms a concave one. This behavior is best explained by the fact that:
A) the two liquids are being kept in graduated cylinders made of different materials.
B) the adhesive forces between water and the walls of the graduated cylinder are greater than the adhesive forces between the mercury and the walls of the graduated cylinder.
C) the cohesive forces between two mercury atoms are stronger than the cohesive forces between two water molecules.
D) the mercury has strong cohesive than adhesive forces, whereas water has strong adhesive than cohesive ones.
October 27, 2014
If a 1500 kg projectile is dropped from a height of 50 m, with what approximate speed will the projectile strike the ground?
A) 10 m/s
B) 30 m/s
C) 75 m/s
D) 100 m/s
October 24, 2014
Which of the following correctly indicates the order and relevant connection between the listed terms:
I. Zygote → Blastula → Gastrula
II. Morula → Inner Cell Mass → Placenta
III. Gastrula → Ectoderm → Neural Tissue
A) I only
B) I and II only
C) I and III only
D) II and III only
October 23, 2014
A satellite of mass ms is orbiting a planet at a speed vs. The planet has a mass Mp. Which of the following represents the radius of the satellite’s orbit measured from the center of the planet?
A) GMp / vs2
B) √(GMpms / vs)
C) ½ (msvs2)
D) Gms / vs2
October 22, 2014
Consider the following two molecules:
The two molecules above can be described as:
October 21, 2014
Which of the following theoretical populations would LEAST meet the requirements of the Hardy-Weinberg equilibrium?
A) A population small mammals with an infinite number of individuals in which there is no migration, generations overlap slightly, and mating is random
B) A population of large birds who only reproduce upon reaching 50 years of age, who mate for life, who only produce one offspring at a time, and who invest over five years in rearing each young before it leaves the next.
C) A population of newts consisting of a small number of individuals confined to a single cave that prevents migration, in which sexual selection prefers smaller males.
D) A population of gibbons living in a stable jungle ecosystem with a large number of randomly mating individuals, in which the allele frequencies are equal between sexes and from which a few individuals migrate each year.
October 20, 2014
The human body takes biological monomers in the form of amino acids and sugars and builds highly complex physiological structures from them. As such, the human body’s relationship with the second law of thermodynamics can best be described by which of the following:
A) The human body is an example of how biological systems are not part of the domain of the second law of thermodynamics, since they decrease entropy through anabolic processes.
B) There is an equilibrium between anabolism and catabolism in the human body, thus it falls under the second law of thermodynamics by not increasing entropy.
C) The human body follows the second law of thermodynamics by creating decreasing entropy within the system by increasing the entropy of the environment.
D) It is impossible to relate thermodynamic laws to complex physiological systems.