March 4, 2015
A psychologist conducts an experiment in which subjects are asked to learn a series of “facts” which are actually statements that have been fabricated by the research team. The subjects consist of undergraduate students at the university where the experiment is being conducted. The subjects are randomly assigned to groups that are compensated either $10 or $20 for their participation, are given either 15 minutes or 30 minutes to learn the facts, and are asked to recall the facts either in the same room in which they learned the facts or in a very different, unfamiliar setting. Which of the following are dependent variables in this experiment?
I. The amount the subjects were compensated.
II. The room in which the subjects were asked to recall facts.
III. The number of facts the subjects can recall.
IV. The time the subjects were given to learn the facts.
A) II only
B) III only
C) I and IV only
D) I, III, and IV only
March 3, 2015
A patient is exposed to a virus whose protein coat has several components that mimic features of several different cell types within the pancreas. If the patient is re-exposed to the virus and an excessive immune response is triggered, the patient may exhibit any of the following symptoms EXCEPT:
A) Decreased lipid digestion
B) Increased blood sugar
C) Decreased aldosterone production
D) Decreased blood sugar
March 2, 2015
I. The angle of incidence
II. The index of refraction for air
III. The index of refraction for glass
A. I only
B. I and II only
C. II and III only
D. I, II, and III
February 27, 2015
A psychologist conducts an experiment in which a dog is trained to roll over. The dog has a small device strapped to its back. Rolling over depresses a button on the device. If the dog rolls over in time, the button is pressed and the device does not shock the dog. This form of conditioning would best be described as using:
A) negative reinforcement through escape
B) negative punishment
C) negative reinforcement through avoidance
D) positive reinforcement
February 26, 2015
Which of the following is true concerning the reduction of a ketone?
A) If carried out using NaBH4, it will result in the formation of a tertiary alcohol.
B) It cannot be accomplished using LiAlH4 without first hydrolyzing the ketone.
C) If carried out using LiAlH4 and workup in acid, it will result in the formation of a secondary alcohol.
D) One equivalent of alcohol will convert the starting product to a hemiacetal and two equivalents will convert it to an acetal.
February 25, 2015
A young woman hears voices in her head, a problem for which she regularly meets with a psychiatrist. This woman is:
a) I only
b) II only
c) III and IV
d) I and III
February 24, 2015
Increasing the pressure of a gas can result in all of the following changes EXCEPT:
A. a decrease in the velocity of the gas molecules
B. an increase in the ratio of the molecular volume to gas volume
C. an increase in temperature
D. a decrease in volume
February 23, 2015
Which compound can form hydrogen bonds?
A) I only
B) II only
C) III only
D) I and II
February 23, 2015
All of the following are characteristic of the condition narcolepsy, EXCEPT:
A) Sudden muscular paralysis
B) Sleep paralysis
C) Significantly greater portion of the day spent asleep
D) Excessive daytime sleepiness
February 20, 2015
Noncompetitive inhibition differs from uncompetitive inhibition in that a noncompetitive inhibitor binds to an allosteric site on the enzyme and prevents it from catalyzing a reaction, whereas uncompetitive inhibitors bind to the enzyme-substrate complex and prevent catalysis. Increasing the substrate concentration would have which of the following effects?
A) Increasing impact of uncompetitive inhibitor and decreasing concentration of noncompetitive inhibitor
B) Decreasing impact of uncompetitive inhibitor and increasing impact of noncompetitive inhibitor.
C) Increasing impact of uncompetitive inhibitor
D) No effect