End product inhibition

Question 1

what is a metabolic pathway

Answer 1

a series of metabolic reactions

the product of the first reaction, takes part in the second reaction and so on

Each reaction is catalysed by a different enzyme

Question 2

what is product inhibition

Answer 2

when the product inhibits the enzyme

Question 3

what is END product inhibition

Answer 3

inhibits an enzyme that acts EARLIER on in the pathway

Question 4

why is END product inhibition good

Answer 4

good way of CONTROLLING the amount of end product produced

so we don’t produce too much of that product

EG. when phosphofructokinase helps produce ATP
and is then inhibited by ATP to prevent more ATP from being made

Question 5

is product/end product inhibition

reversible OR irreveresible?

Answer 5

Reversible

• as level of product decreases
• level of inhibition decreases
• enzymes function again
• more product CAN be made

Question 6

what can enzymes be synthesised to.

To prevent causing damage to cells

Answer 6

inactive precursors

part of these molecules inhibit some of its enzyme action

once the precursor is removed the enzyme can become active again