- | Page
AP Bio Practice Exam 1 Correct 100%
Question : Which of the following best describes the
cellular location where pyruvate dehydrogenase is most likely active?
Correct answer: The mitochondrial matrix
Question : The maximum production rate of acetyl-CoA
under condition 1 is closest to which of the following?
Correct answer: 1 micromole/sec
Question : Which of the following observations provides
the best evidence that acetyl-CoA negatively regulates pyruvate dehydrogenase activity?
Correct answer: The rate of the pyruvatedehydrogenase-
catalyzed reaction is slower in the presence of a higher concentration of acetyl-CoA
Question : Which of the following best describes the
difference between the total amount of DMSP produced
- | Page
by adults compared to juveniles at the start of the 32°C trial?
Correct answer: Adult corals produced 5 times more
DMSP than juveniles produced.
Question : In addition to the effect of temperature on
DMSP produced by corals and their symbionts, which of the following relationships is also being considered in this experiment?
Correct answer: Effect of additional DMSP produced by
symbionts and the corals' age
Question : Which of the following best describes the
scientists' findings concerning the density of symbionts presented in Figure 2 ?
Correct answer: The symbiont density at 32°C was
different from the density at 27°C on days 5 and 10 of the experiment
- | Page
Question : A particular gene has two alleles, a dominant
allele A and a recessive allele a. The frequency of allele A is 0.55. If the population is in Hardy-Weinberg equilibrium with respect to the gene, then what is the expected frequency of genotype Aa ?
Correct answer: 0.495
Question : Based on the codon chart above, which of the
following amino acid changes is most likely found in the mutated protein?
Correct answer: Glu → Val
Question : Figure 1 shows the inheritance of a particular
genetic condition in three generations of one family.Which of the following best explains the observed pattern of inheritance?
Correct answer: The condition is passed from mothers to
offspring via a mitochondrial gene
- | Page
Question : Oncogenes are genes that can cause tumor
formation as a result of a particular mutation. Which of the following potential therapies would be most effective at preventing the expression of an oncogene?
Correct answer: Introducing a chemical that binds to
transcription factors associated with the oncogene's promoter
Question : Ultraviolet (UV) radiation can damage DNA
by breaking weak bonds. Which of the following best explains how this occurs?
Correct answer: UV radiation disrupts the double helix
structure by breaking the hydrogen bonds between the nitrogenous base pairs
Question : Based on the data in the table, which of the
following lizard species are most closely related?