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Enzyme Structure and Function

Part of Enzymes in Digestion — GCSE Biology

This diagram covers Enzyme Structure and Function within Enzymes in Digestion for GCSE Biology. Enzyme structure and function, digestive enzymes, factors affecting enzyme activity, lock and key model, and practical investigations It is section 3 of 19 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.

Topic position

Section 3 of 19

Practice

20 questions

Recall

25 flashcards

Enzyme Structure and Function

Enzyme Active Site Substrate 1. Substrate approaches 2. Enzyme-Substrate Complex Perfect fit at active site 3. Products formed Substrate broken down 4. Products released Enzyme unchanged Lock and Key Model of Enzyme Action The enzyme's active site has a complementary shape to the substrate

Keep building this topic

Read this section alongside the surrounding pages in Enzymes in Digestion. That gives you the full topic sequence instead of a single isolated revision point.

Key Facts: Digestive EnzymesEnzyme Models: Lock and KeyThe Chemical Breakdown ChampionsBeyond GCSE: Induced Fit Model

Practice Questions for Enzymes in Digestion

What are enzymes?

  • A. Carbohydrates that provide energy for cells
  • B. Biological catalysts that speed up chemical reactions
  • C. Proteins that are used up during digestion
  • D. Molecules that store genetic information
1 markfoundation

Explain the effect of increasing temperature on enzyme activity.

3 marksstandard

Quick Recall Flashcards

What is an enzyme?
A biological catalyst that speeds up chemical reactions by lowering activation energy. Enzymes are proteins with specific 3D shapes.
What does lipase do?
Breaks down lipids (fats) into fatty acids and glycerol. Produced by pancreas, works in small intestine.

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Key Facts: Digestive Enzymes

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Enzyme Models: Lock and Key