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Biochemistry

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Carbohydrates

Question
26 out of 40
 

Phosphorylase b is inactivated by: (AIIMS Nov 2008)



A ATP
B Ca2+

C Camp
D Glucose

Ans. D Glucose (Ref: Harper 27th / 161, 162, 163, Chatterjee 6th / 326, 327)

Insulin inhibits the activation of phosphorylase b. It does this by increasing uptake of glucose leading to increased formation of glucose 6 phosphate, which is an inhibitor of phosphorylase kinase.

Glucose 6-p is an inhibitor of phosphorylase kinase, i.e. It effectively inhibits activation of phosphorylase b.

Factors maintaining phosphorylase in its activity form (phosphorylase a)

c-AMP

Calcium

ATP

Factors maintaining phosphorylase in its inactive form (phosphorylase b)

Insulin

Protein phosphatase

Glucose 6phosphate

Carbohydrates Flashcard List

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