CIE AS Enzymes

Welcome to your CIE AS Enzymes

In lock and key hypothesis, substrate is the:

The purpose of hydrophillic R group in enzymes is:

What is the modern hypothesis for enzyme action?

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

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.

What is the optimum temperature of most human enzymes?

What are the factors that affect enzyme action?


a) Enzyme concentration


b) Substrate concentration


c) pH


d) Temperature

Select the incorrect statement regarding enzymes.

What is meant by 'denaturation' of enzymes?