Cofactors, coenzymes and prosthetic groups 2.1.4 (e) Flashcards
1
Q
what is a cofactor?
A
an inorganic component which allows for a biological catalyst to function
2
Q
what is a coenzyme?
A
an organic molecule which helps enzyme action
3
Q
what cofactor is needed for amylase action?
A
Cl-
helps amylase to form a correctly shaped active site
4
Q
what is a prothetic group?
A
a non-protein group which is tightly bound to the protein
are cofactors
5
Q
what cofactor is needed for carbonic anhydrase?
A
Zn2+
6
Q
what are precursor enzymes?
A
enzymes which need to undergo a change in their tertiary structure to be activated
7
Q
what can cause an enzyme to activate?
A
cofactors and coenzymes
changes in conditions
- pH
- temperature
8
Q
what is an unactivated enzyme?
A
apoenzyme
9
Q
what is an activated enzyme?
A
holoenzyme
