The diagram shows some steps in the citric acid cycle in human muscle cells - Scottish Highers Biology - Question 6 - 2022
Question 6
The diagram shows some steps in the citric acid cycle in human muscle cells.
(a) State the exact location of the citric acid cycle within cells.
(b) Name compound ... show full transcript
Worked Solution & Example Answer:The diagram shows some steps in the citric acid cycle in human muscle cells - Scottish Highers Biology - Question 6 - 2022
Step 1
State the exact location of the citric acid cycle within cells.
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Answer
The citric acid cycle occurs in the central matrix of mitochondria.
Step 2
Name compound Y.
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Answer
Compound Y is oxaloacetate.
Step 3
Suggest how an increase in the concentration of succinyl CoA could decrease the activity of the enzyme citrate synthase.
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Answer
Succinyl CoA acts as a competitive inhibitor of citrate synthase, meaning that an increased concentration of succinyl CoA could bind to the active site of citrate synthase, preventing acetyl CoA from binding and thus decreasing the enzyme's activity.
Step 4
Name a product of fermentation in muscle cells.
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Answer
A product of fermentation in muscle cells is lactate.
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