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AP Biology 3.1 Enzymes

Practise AP Biology 3.1 questions by connecting enzyme structure and active-site compatibility with reaction rates and biological regulation.

Syllabus
Effective Fall 2025
Course
AP Biology

Exam points

  • explain that enzymes lower activation energy without changing reaction outcome
  • match active-site shape or charge with substrate specificity in enzyme catalysis
  • explain how precursor cleavage can activate an enzyme before a response

3.1 Enzymes question 1

[Maximum number: 1]

Figure 1 shows the reactions of the metabolic pathway used to synthesize amino acid B from

amino acid A in cells.

Figure 1. Synthesis of amino acid B from amino acid A

Figure 1. Synthesis of amino acid B from amino acid A

Describe a characteristic of an enzyme's active site that allows it to catalyze a specific

chemical reaction.

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