CAIE A-Level Biology A2 12.2.4 Link Reaction Questions
Explain conversion of pyruvate to acetyl CoA in the link reaction using evidence from each question and mark scheme.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- A2
Exam points
- Explain the link reaction converting pyruvate to acetyl coenzyme A.
CAIE A-Level Biology A2 12.2.4 Link Reaction Questions question 1
[Maximum number: 1]
Lipids can be metabolised to provide ATP.
- The enzyme lipase hydrolyses lipids to glycerol and fatty acids.
- The hydrocarbon chain of the fatty acid breaks down into smaller, 2C compounds.
- Each 2 C compound reacts with coenzyme A to form acetyl coenzyme A.
State the role of acetyl coenzyme A in respiration.
carrier of, 2C (unit) / acetyl group / acetate, to, the Krebs cycle / oxaloacetate ;
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