Enzymes

Enzyme activity can be blocked or retarded by a minute disturbance in

• density

• optimum pH

• temperature

• concentration

The place on an enzyme on which a chemical substance attaches itself is called the

• active site

• available site

• catalytic site

• binding site

Enzymes are quite sensitive to change in concentration, temperature and

• location

• climate

• pH

• pressure

A chemical substance which has the ability to block an active site is called a(n)

• blocker

• deactivator

• inhibitor

• enzyme

If the vibration of molecules becomes too violent due to increasing heat, enzyme activity will be lost and enzyme is said to be

• cataylsed

• broken

• denatured

• failed

Enzymes are capable of recognising and reacting with a special chemical substance called the

• activator

• substrate

• co-factor

• co-enzyme

If the concentration of an enzyme is increased by two fold, rate of reaction would be

• halved

• doubled

• tripled

• stopped

Chemical reactions are accelerated by

• high concentration

• high pH

• high tempature

• high density

For enzyme activity in the human body, the optimum temperature is

• 37°C

• 35°C

• 30°C

• 39°C

The mechanism of enzyme activity is known as

• hydrolysis

• catalysis

• proteolysis

• hydration