Enzyme arginase is found in

What binds to the active site of an enzyme?

The figure given below shows the conversion of a substrate into product by an enzyme. In which one of the four options $(A-D)$ are the components of the reaction labeled as $A, B, C,$ and $D$ identified correctly?

Select the option which is not correct with respect to enzyme action.

Competitive inhibitors (like malonate) alter

Which of the following units have a shape that is complementary to each other,similar to a lock and key?