AAMC MCAT PRACTICE EXAM 1

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AAMC MCAT PRACTICE EXAM 1

Actual Qs and Ans Expert-Verified Explanation

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-Guarantee passing score -100 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: The author uses the term "culture as commodity" to characterize which aspect of Haitian voodoo?

• The charging of admission at voodoo sessions

II. The molding of voodoo to fit audience expectations III. The sale of voodoo trinkets and other artifacts

• I only
• III only
• I and II only
• II and III only

Answer:

• I and II only

The answer is C, because both options I and II are correct, while option III is not. The author explains that the "outsider" to Haiti expects voodoo to be "almost synonymous" with the country itself. According to the author, this powerful "identification" of Haiti with voodoo leads to "culture as commodity"-or the outsiders essentially being able to get what they want from voodoo. In paragraph 3, the author describes a form of voodoo that is staged for outsiders and which the audience pays admission to watch; this supports option I. Also, in paragraph 3, the author contends that the form of voodoo witnessed at Mariani "confirms the popular expectation of 'scary voodoo'"; this supports option II.

Question 2: By what factor is the proton concentration increased in the experiments shown in Figure 1B from those shown in Figure 1A?Figure 1A - pH 7 Figure 1B - pH 4

• 2
• 10

C) 200

D) 1000

Answer:

D) 1000

The answer to this question is D because the pH scale is logarithmic (pH = ?log([H+]). A difference of 3 pH units corresponds to a 103 = 1000-fold difference in proton concentrations.Question 3: When concentrated urine is being produced, in which of the following regions of the kidney will the glomerular filtrate reach its highest concentration?

• Proximal convoluted tubule
• Distal convoluted tubule
• Cortical portion of the collecting duct
• Medullary portion of the collecting duct

Answer:

• Medullary portion of the collecting duct

The answer is D because glomerular filtrate is most concentrated in the medullary portion of the collecting duct, compared to the other kidney structures listed.

Question 4: MBCD is composed of which type of molecule?

"MBCD is a cyclic oligosaccharide that binds and removes cholesterol from cell membranes."

• Amino acids
• Fatty acids
• Nucleotides
• Carbohydrates

Answer:

• Carbohydrates

The answer is D because MBCD is a cyclic oligosaccharide, which means it is composed of carbohydrates.Question 5: Which nucleotide pairing(s) would be recognized by the MMR system during DNA replication?

• dTMP and dCMP

II. dGMP and dAMP III. dAMP and dTMP

• I only
• III only
• I and II only
• I, II, and III

Answer:

• I and II only

The MMR system recognizes and repairs nucleotide mismatches during DNA replication. The nucleotide pairs dTMP and dCMP (I) and dGMP and dAMP (II) are mismatches. dAMP and dTMP (III) is a correct pairing.Question 6: The information in the passage best supports the conclusion that Intron 8 of HSP110 most likely contains which of the following?

• Stop codon
• Splice acceptor site
• HSP110 gene promoter
• Partial coding sequence of HSP110

Answer:

• Splice acceptor site

The answer to this question is

• Deletions in the T17 microsatellite located in Intron 8 of HSP110 cause Exon 9 to be omitted from

the final mRNA sequence during pre-mRNA processing. This would occur during alternative splicing, which strongly suggests that the microsatellite contains sequences that influence splicing.

Question 7: The formation of which reaction products is increased in MBCD-treated MDR cells after exposure to 100 µM cholesterol?"ATPase activity"

A) AMP + ADP

• ADP + Pi
• ATP + Pi

D) ADP + ATP

Answer:

• ADP + Pi

The answer is B because at 100 µM cholesterol in the depleted MDR cells, ATPase activity, which is ATP hydrolysis activity, is completely restored. ATP hydrolysis produces ADP and inorganic phosphate.Question 8: When the current in the micro-robot's circuit increases and the resistance of the

circuit remains constant, the voltage of the circuit:

• decreases
• increases
• is constant
• is zero

Answer:

• increases

V = IR

The answer to this question is B because according to Ohm's law, current is equal to voltage divided by resistance. If current increases and resistance is constant, then voltage increases as well.Question 9: Each of the following equations shows the dissociation of an acid in water. Which of the reactions occurs to the LEAST extent?

• HCl + H2O ? H3O+ + Cl?

B) HPO42? + H2O ? H3O+ + PO43?

C) H2SO4 + H2O ? H3O+ + HSO4?

D) H3PO4 + H2O ? H3O+ + H2PO4?