Unit 1.6 Metabolic Pathways

Question 1

What is metabolism?

Answer 1

The biochemical processes which occur within an organism in order to keep it alive

Question 2

What is a catabolic pathway?

Answer 2

Reactions that involve the breakdown of larger molecules into smaller molecules, usually releasing energy

Question 3

What is an Anabolic pathway?

Answer 3

Reactions that require energy to build smaller molecules into larger more complex molecules

Question 4

What is induced fit?

Answer 4

The active site is flexible and changed very slightly when the substrate molecule enters allowing it to fit very closely around the substrate molecule

Question 5

Competitive inhibitors are affected by:

Answer 5

Inhibitor concentration and substrate concentration

Question 6

Non competitive inhibitors are affected by:

Answer 6

Inhibitor concentration only

Question 7

How can the action of a competitive inhibitor be reversed?

Answer 7

Increasing substrate concentration

Question 8

What is a competitive inhibitor?

Answer 8

A substance which decreases the rate of an enzyme controlled reaction by occupying the active site

Question 9

What is a non-competitive inhibitor?

Answer 9

A substance which decreases the rate of an enzyme controlled reaction by occupying a site other than the active site

Question 10

What is end-product inhibition?

Answer 10

A method of controlling metabolic pathways that works by negative feedback if intermediates and end products