CIE AS Enzymes

Welcome to your CIE AS Enzymes

The fitting of substrate in active site is called as:

A molecule which speeds up a chemical reaction but remains unchanged at the end of the reaction.

In lock and key hypothesis, substrate is the:

What are the factors that affect enzyme action?


a) Enzyme concentration


b) Substrate concentration


c) pH


d) Temperature

What is meant by 'denaturation' of enzymes?

The rate of an enzyme-controlled reaction is always _______ at the begining.

What is the optimum temperature of most human enzymes?

Select the incorrect statement regarding enzymes.

What is the modern hypothesis for enzyme action?

The purpose of hydrophillic R group in enzymes is: