Enzyme Control

Question 1

What are the two types of metabolic control?

Answer 1

Two types of metabolic control: Intrinsic or Extrinsic

Question 2

What does extrinsic control involve?

Answer 2

Extrinsic control:
*Involves hormonal systems (major system)
*The endocrine system (controlled by hormones)

Question 3

What does extrinsic control do?

Answer 3

*Instructs cells (externally) on major metabolic direction

Question 4

What are enzyme and protein activity controlled by?

Answer 4

Enzyme and protein activity is controlled by:
Intrinsic and extrinsic control

Question 5

How many mechanisms are there for controlling protein activity?

Answer 5

There are 5 mechanisms for controlling protein activity

Question 6

What does intrinsic control do?

Answer 6

Intrinsic control: co-ordinates different metabolic pathways and prevents shortages or pile-ups

Question 7

What are the 5 mechanisms for enzyme control?

Answer 7

5 mechanisms for enzyme control:
*Covalent modification
*Isoenzymes
*Allosteric control
*Proteolytic activation
*Altered quantity of enzymes present via transcription

Question 8

Name an example of covalent modification

Answer 8

Example of covalent modification: phosphorylation

Question 9

What is an isozyme?

Answer 9

Isozyme: enzymes that have a slightly different amino acid sequence but catalyse the SAME reaction