Concept explainers
(a)
Interpretation:
The enzymes at the three control points in the citric acid cycle are to be identified.
Concept introduction:
Citric acid cycle is the third stage in the oxidation of food. It begins with two carbon acetyl units. The acetyl units are formed by the oxidation of pyruvate obtained from glycolysis. It is termed as citric acid cycle as the key intermediate in the cycle is citric acid.
(b)
Interpretation:
An explanation as to how the control point inhibition by NADH and ATP enables the cell to be responsive to energy needs is to be stated.
Concept introduction:
Citric acid cycle is the third stage in the oxidation of food. It begins with two carbon acetyl units. The acetyl units are formed by the oxidation of pyruvate obtained from glycolysis. It is termed as citric acid cycle as the key intermediate in the cycle is citric acid.
(c)
Interpretation:
The benefit of the two control-point enzymes being activated by ADP to the regulation of the cell is to be stated.
Concept introduction:
Citric acid cycle is the third stage in the oxidation of food. It begins with two carbon acetyl units. The acetyl units are formed by the oxidation of pyruvate obtained from glycolysis. It is termed as citric acid cycle as the key intermediate in the cycle is citric acid.
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