Bio/Biochem
A commonly used approximation of mean arterial pressure (MAP) relates MAP to the measured systolic blood pressure (SBP) and diastolic blood pressure (DBP): MAP=(2/3)DBP+(1/3)SBP. If the MAP increased by 10 mm Hg without a change in DBP, the new SBP would be:
A. the original SBP plus 10
B. the original SBP plus 30
C. the original SBP plus 60
D. the original SBP plus 90
B. the original SBP plus 30
(see slideshow) Four charged particles of equal mass are initially fixed in place along a straight line, as shown above. If all the charged particles are released at the same time, which particle would initially accelerate most rapidly?
A. Particle A
B. Particle B
C. Particle C
D. Particle D
B. Particle B
Which of the following compounds can participate in hydrogen bonding with methanol (CH3OH)?
l. NH3
ll. HF
lll. CH4
A. l only
B. l and ll only
C. ll and lll only
D. l, ll, and lll
B. l and ll only (NH3 and HF)
Research has shown that when individuals consume the same food stimulus, they reach satiety faster compared to when they consume varied food stimuli. This finding suggests that satiety, which involves a reduction in both psychological and behavioral responses to food stimuli, may be partly due to:
A. desensitization.
B. habituation.
C. operant conditioning.
D. generalization.
B. habituation
A certain pet store sells only dogs and cats. In March, the store sold twice as many dogs as cats. In April, the store sold twice the number of dogs that it sold in March, and three times the number of cats that it sold in March. If the total number of pets the store sold in March and April combined was 500, how many dogs did the store sell in March?
(A) 80
(B) 100
(C) 120
(D) 160
(E) 180
(B) 100
The double-stranded coding region of a certain gene consists of a total of 564 nucleotides, 135 of which are adenosine residues. If the sense strand contains 75 adenosine residues, then all of the following must be true EXCEPT:
A. The antisense strand contains 75 thymidine residues.
B. The sum of the guanosine and cytidine residues in the sense strand is 147.
C. Half of the base pairs in the coding region are adenosine and thymidine residues.
D. The sum of the adenosine and guanosine residues in the coding region equals the sum of the thymidine and cytidine residues.
C. Half of the base pairs in the coding region are adenosine and thymidine residues.
During the beta decay process, a neutron transforms into an electron and a proton, and the electron is ejected out of the atom. A closed system containing a number of atoms is electrically neutral and undergoes 120 beta decay processes. What is the resulting net charge of the closed system? (Note: the elementary charge e = 1.6 x 10-19 C)
A. 0 C
B. +1.92 x 10-17 C
C. -1.92 x 10-17 C
D. +3.84 x 10-17 C
A. 0 C
(see slideshow) The structure of the antihypertensive drug captopril is shown interacting with the active site of an enzyme. Which region depicts the weakest type of interaction?
A. l
B. ll
C. lll
D. lV
D. lV
Which statement is NOT accurate regarding human social behavior?
A. Early attachment style tends to have long-lasting effects on relationships and well-being.
B. Sensitive and responsive caregiving tends to result in more secure attachments.
C. Attachment styles result from bonding that occurs within the first hours after birth.
D. Stranger anxiety is considered a normal developmental milestone for infants.
C. Attachment styles result from bonding that occurs within the first hours after birth.
The average (arithmetic mean) high temperature for x days is 70 degrees. The addition of one day with a high temperature of 75 degrees increases the average to 71 degrees.
Quantity A = x
Quantity B = 5
Which of the following is true?
A. Quantity A is greater.
B. Quantity B is greater.
C. The two quantities are equal.
D. The relationship cannot be determined from the information given.
B. Quantity B is greater.
Which amino acid substitution would result in the greatest change in the net charge of a polypeptide at pH 7?
A. Glu to Lys
B. Asp to Ala
C. Lys to Arg
D. Arg to Ser
A. Glu to Lys
Suppose that a liquid was heated until it just reaches its exact boiling point. What will happen to the liquid when a small amount of additional heat is added to it?
A. None of the liquid will turn to gas, and the temperature will increase.
B. All the liquid will turn to gas, and the temperature will remain the same.
C. A small amount of the liquid will turn to gas, and the temperature will remain the same.
D. A small amount of the liquid will turn to gas, and the temperature will increase.
C. A small amount of the liquid will turn to gas, and the temperature will remain the same.
Which of the following statements correctly describes the peaks displayed in a mass spectrum?
A. The tallest peak is the molecular ion.
B. The peaks are uncharged molecules.
C. The height of each peak is dependent on molecular weight.
D. The peaks represent ionized fragments of the sample.
D. The peaks represent ionized fragments of the sample.
Which of the following is true regarding the social stratification system referred to as a caste system? Caste systems have status positions that are:
A. achieved, which makes social mobility difficult.
B. ascribed, which makes social mobility difficult.
C. achieved, which makes social mobility possible.
D. ascribed, which makes social mobility possible.
B. ascribed, which makes social mobility difficult.
(see slideshow)
A.
B.
C.
D.
E.
A.
The KM of an enzyme is always decreased by which class of inhibitor?
A. Mixed
B. Noncompetitive
C. Competitive
D. Uncompetitive
D. Uncompetitive
A force of 50 N is used to push a wheelchair forward at constant velocity against friction. If the wheelchair is displaced 0.5 m each second, what is the mechanical power expended when transporting the wheelchair?
A. 13 J
B. 25 W
C. 100 W
D. 200 J
B. 25 W
A. 6
B. 7
C. 8
D. 14
C. 8
An older individual learns about the potential side effects of a drug she is currently taking from a pharmaceutical advertisement she sees on television. When she recalls the information later, she remembers hearing about those potential side effects from her physician, not the advertisement. This scenario illustrates which of the following?
A. Source monitoring error
B. Fundamental attribution error
C. Negative priming
D. Hindsight bias
A. Source monitoring error
(see slideshow)
A.
B.
C.
D.
E.
C.
Fatty acid oxidation and synthesis occur in which subcellular compartments, respectively?
A. In the mitochondria and the cytosol
B. In the nucleus and the mitochondria
C. In the cytosol and the nucleus
D. In the cytosol and the mitochondria
A. In the mitochondria and the cytosol
A spring is extended 15 cm from its equilibrium point. If the spring constant k is 75 N/m, the magnitude and direction of the elastic force Fel are described by which of the following?
A. 1.1 x 101 N; oriented away from the equilibrium point
B. 1.1 x 101 N; oriented toward the equilibrium point
C. 1.1 x 103 N; oriented away from the equilibrium point
D. 1.1 x 103 N; oriented toward the equilibrium point
B. 1.1 x 101 N; oriented toward the equilibrium point
Which neutrally charged functional group forms in an acid-catalyzed reaction between a secondary amine and a ketone?
A. Enamine
B. Nitrile
C. Imine
D. Alkene
A. Enamine
Symptoms of a myocardial infarction can differ between individuals. Women who experienced a myocardial infarction were later interviewed by a researcher about their decision to seek treatment. Many participants noted that they delayed seeking treatment because their symptoms didn't match the "prototypical" heart attack symptoms they had seen in the media. Which concept best explains this phenomenon?
A. Representativeness heuristic
B. Availability heuristic
C. Actor-observer bias
D. Hindsight bias
A. Representativeness heuristic
(see slideshow)
1.
2.
3.
4.
5.
2.