CAIE A-Level Biology A2 12.2.5 Krebs Cycle Carbon Compounds Questions
Explain Krebs cycle carbon compounds and their formation using evidence from each question and mark scheme.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- A2
Exam points
- Explain the Krebs cycle carbon compounds and how they are formed.
CAIE A-Level Biology A2 12.2.5 Krebs Cycle Carbon Compounds Questions question 1
[Maximum number: 9]
Describe the series of reactions that make up the Krebs cycle.
1 oxaloacetate accepts, acetate/acetyl group/2C fragment ;
2 to form citrate ;
34 C to 6C ;
4 decarboxylation ;
5CO2 released ;
6 dehydrogenation/oxidation ;
7 reduced NAD produced ;
8 reduced FAD produced ;
9 ATP produced ;
10 substrate-linked/substrate-level, phosphorylation ;
11 ref. to intermediate compounds ;
12 enzyme-catalysed reactions ;
13 oxaloacetate regenerated ;
[max 9]
[Total: 15]
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