O n the basis of the two reactions below, decide which of the following statemen

Question

O n the basis of the two reactions below, decide which of the following statements are true and which are false . If a statement is false, explain why it is false.

1: ATP + Y --> Y - P + ADP G = – 100 kcal/mole

2: Y - P + A --> B G = 50 kcal/mole

A. Reaction 1 i s favorable because of the large negative G associated with the hydrolysis of ATP.

B. Reaction 2 is an example of an unfavorable reaction

. C. Reactions 1 and 2 are coupled reactions, and when they take place together, reaction 2 will proceed in the forwar d direction.

D. Reaction 2 can be used to drive reaction 1 in the reverse direction.

Explanation / Answer

(A) True

(B) False, Because delta G is positive.

(C) True

(D) False, Because reaction 2 itself requires energy hence it cannot drive the 1 st reaction.

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