Q.

Which one is true for ATP
 a) ATP is prosthetic part of an enzyme         b)    ATP is an enzyme
 c) ATP is organic ions of enzyme                 d)    ATP is a coenzyme

1 A
2 B
3 C
4 D

Ans.

(d) ATP is a coenzyme. Coenzyme is an organic cofactor molecule smaller than protein that bonds with a specific enzyme, while the reaction is being catalysed.