Biochemistry Module 3 Exam Questions and Answers 2024/2025 | A+ Grade Verified Study Guide | Comprehensive Biochemistry Review

Biochem Module 3 Exam questions and answers 2024\2025
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T/F: The amino acids lysine and arginine both contain sulfur atoms.
- correct answer False



*only cysteine and methionine contain sulfur



T/F: The amino acids serine and methionine both contain sulfur atoms.
- correct answer False



*serine does not, but methionine does



T/F: The following secondary structure shown below is an example of a beta-turn.
- correct answer False



T/F: The side chain of histidine is bonded to the backbone nitrogen atom.
- correct answer False



*proline, not histidine



T/F: The side chain of proline is bonded to the backbone nitrogen atom.
- correct answer True



T/F: The name of the molecule that binds to an enzyme is called the apoenzyme.
- correct answer False



*substrate, not apoenzyme

, T/F: The name of the molecule that binds to an enzyme is called the ligand.
- correct answer False



*substrate, not ligand



T/F: An inhibitor that binds at the active site is an uncompetitive inhibitor.
- correct answer False



*competitive inhibitor, not an uncompetitive inhibitor



T/F: An inhibitor that binds at the active site is a coenzyme.
- correct answer False



*competitive inhibitor, not a coenzyme



Which amino acids differ by only one atom?



A) Ser and Thr

B) Leu and Ile

C) Ala and Ser

D) Asp and Asn

E) Ser and Cys
- correct answer E) Ser and Cys



*serine has an -OH group where cysteine has an -SH group



Which amino acids both have an R group (side chain) with an -OH functional group?



A) Ser and Thr