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CAIE IGCSE Biology 5.1.7 Specificity of Enzymes in Terms Questions

Practise explaining enzyme specificity by comparing a substrate with the complementary shape of an active site and linking successful binding to complex formation.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • state that a substrate binds only when its shape is complementary to the enzyme's active site
  • explain why lipase cannot digest protein by comparing protein shape with the lipase active site
  • link successful complementary fit to substrate binding and formation of an enzyme-substrate complex

CAIE IGCSE Biology 5.1.7 Specificity of Enzymes in Terms Questions question 1

[Maximum number: 3]

Fig. 5.1 shows a computer model of the enzyme alcohol dehydrogenase, which is the enzyme responsible for breaking down alcohol.

Fig. 5.1

Fig. 5.1

Enzymes have a specific three dimensional shape.
Explain why the shape of an enzyme is important.

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