Posts Tagged ‘Biology’

This quiz is purely on enzymes only.

1. What class of enzymes breaks down substrates by adding or losing, hydrogen and oxygen?

A) Hydrolases

B) Transferases

C) Oxidoreductases

D)Ligases

 

2. Ligases is the only one of the six major classes of enzymes to

A) Undergo hydrolysis

B) Combine molecules

C) Oxidise a substrate

D)Rearrange the structure of a substrate.

 

3.Uncompetitive Inhibitors binds to

A) Active site only

B) Enzyme-substrate complex only

C) Both the free enzyme and enzyme-substrate complex

D) To the substrate molecule only

 

4. Mixed Inhibitors binds to either the free enzyme or to the enzyme-substrate complex. How does this affect Vmax and Km?

A) Nothing is affected

B) Vmax increases and Km can increase and decrease

C) Vmax is reduced and Km can increase and decrease

D) Vmax remains constant, while Km increases

 

5) Which type inhibitor binds only to the active site?

A) Non-competitive

B) Uncompetitive

C) Competitive

D)Mixed

 

Best of luck.

Thank you for you time.