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CAIE A-Level Biology AS 3.1.1 Enzymes As Globular Proteins Questions

Explain how enzyme globular structure creates the shape and properties required for enzyme function.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • Explain why enzymes are globular proteins and relate their three-dimensional structure to enzyme function.

CAIE A-Level Biology AS 3.1.1 Enzymes As Globular Proteins Questions question 1

[Maximum number: 1]

The diagram shows a simple metabolic pathway.

W→X→Y→Z\mathrm{W} \rightarrow \mathrm{X} \rightarrow \mathrm{Y} \rightarrow \mathrm{Z}

The letters W, X, Y and Z represent four different substances. At each step in the diagram the substrate undergoes a chemical reaction catalysed by an enzyme. The reaction produces the next substance in the pathway.

Which statements correctly describe the enzymes taking part in this metabolic pathway?
1 They are all globular proteins.
2 They all have the same tertiary structure.
3 They all contain hydrogen atoms in their structure.

A

1, 2 and 3

B

1 and 2 only

C

1 and 3 only

D

2 only

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