AP Biology MCQ Practice Exam #1; Questions & Answers Latest Update 100% Solved
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Course
AP Biology
Institution
AP Biology
AP Biology MCQ Practice Exam #1; Questions & Answers
Latest Update 100% Solved
Humans produce sweat as a cooling mechanism to maintain a stable internal temperature.
Which of the following best expalins how the properties of water contribute to this physiological
process? Correct answer-The ...
AP Biology MCQ Practice Exam #1; Questions & Answers
Latest Update 100% Solved
Humans produce sweat as a cooling mechanism to maintain a stable internal temperature.
Which of the following best expalins how the properties of water contribute to this physiological
process? Correct answer-The high heat of vaporization of water allows the body to
remove excess heat through a phase change of water from liquid to gas.
A student placed a semipermeable membrane inside a U-shaped channel with two chambers.
Membrane permits the movement of water but not salt. The student wants to vary the rate of
osmosis that occurs across the membrane. Which experimental design will result in the fastest
net rate of water movement into chamber A? Correct answer-Placing salt in chamber A
and distilled water in chamber B.
What best describes the role of water in photosynthesis? Correct answer-Water
molecules donate electrons to the electron transport chain.
What evolutionary advantage does compartmentalization of core metabolic processes offer
eukaryotes? Correct answer-Evolution of a nucleus in eukaryotes separates the processes
of transcription and translation and they can be regulated separately.
Pyruvate dehydrogenase is an enzyme that converts pyruvate to acetyl-CoA. Acetyl-CoA is
further metabolized in the Krebs cycle. A researcher measured the accumulation of acetyl-CoA
in a reaction containing pyruvate and pyruvate dehydrogenase under several different
conditions
5. Which of the following best describes the cellular location where pyruvate dehydrogenase is
most likely active?
, AP Biology MCQ Practice Exam #1; Questions & Answers
Latest Update 100% Solved
6. The maximum production rate of acetyl-CoA under condition 1 is closer to which of the
following?
7. Which of the following observations provides the best evidence that acetyl-CoA negatively
regulates pyruvate dehydrogenase activity?
8. Which of the following best explains the buildup of lactic acid in individuals with the
mutation? Correct answer-5. The mitochondrial matrix
6. 1 micromole/sec
7. The rate of pyruvate dehydrogenase-catalyzed reaction is slower in the presence of a higher
concentration of acetyl-CoA
8. Cells undergo fermentation because pyruvate cannot be metabolized to proceed into the
Krebs cycle
Which of the following best explains how water is able to move upward from the roots of a
plant, through its xylem in the stem, and out to the leaves? Correct answer-Water and
the xylem are both polar. Water molecules have the ability to form hydrogen bonds with each
other and with the walls of the xylem.
In a study, researchers determined the intracellular location of protein X in cultured cells both
before and after exposing the cells to the signaling molecule. Results shown below
Based on results, which best describes what protein X is? Correct answer-Protein X is a
transcription factor.
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