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Question 1
An amino acid has a pKa of 2.2 for its alpha-carboxyl group and a pKa of 9.2 for its alpha-amino group. At physiological pH (7.4), what is the predominant ionic form of this amino acid?
Correct Answer:
Zwitterion with net zero charge
Question 2
Which of the following amino acids is most likely to be found in the interior of a globular protein in aqueous solution?
Correct Answer:
Leucine
Question 3
Passage: A researcher studies a mutant enzyme that converts substrate S to product P. Kinetic data collected at varying [S] with fixed enzyme concentration are shown below: [S] (mM) | Initial velocity (µM/min) 0.5 | 15 1.0 | 25 2.0 | 37 5.0 | 48 10.0 | 53 The researcher estimates Vmax ≈ 60 µM/min from a Lineweaver-Burk plot. What is the approximate Km of this enzyme?
Correct Answer:
2.0 mM
Question 4
Passage (continued from above): A competitive inhibitor (I) is added at a fixed concentration. Which change in kinetic parameters is expected?
Correct Answer:
Vmax stays the same; apparent Km increases
Question 5
During glycolysis, glucose is converted to two molecules of pyruvate. Which of the following correctly describes the net energy yield per glucose in glycolysis under aerobic conditions?
Correct Answer:
Net gain of 2 ATP and 2 NADH
Question 1
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Prepare with the MCAT Bio Biochem Practice Questions - MCAT Biological and Biochemical Foundations of Living Systems Exam practice quiz. This question bank includes 100 questions covering passage, describes, researcher, correctly, and cycle. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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MCAT Bio Biochem Practice Questions - MCAT Biological and Biochemical Foundations of Living Systems Exam

This practice set contains 100 questions from the matching question bank and focuses on passage, describes, researcher, correctly, and cycle. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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