Biology Homework help !

[quadpatt]

Hi,

I'm really stuck on this part of my AS biology homework.

With reference to theenzymes catalysing the stages of glycolysis, explain how their activity can beaffected. Consider in your discussion if this is a form of intrinsic regulationor extrinsic regulation.

1) Hexokinase:

2) Phosphofructokinase:

3) Pyruvate kinase:

I understand these enzymes have a role in converting and regulation but I can't seem to find any information that I can understand. Any help on this would be greatly appreciated!

Thank you

[irfuzzbucket]

your homework is late.

 

Kinase enzymes phosphorylate molecules. Pyruvate kinase for example, phosphorylates (adds a phosphorous) to pyruvate. Adding and removing phosphorous in these molecules is seen in cellular respiration and photosynthesis.

 

Lots of things can change the rate of enzyme activity: concentrations, salts, temperature, pH, etc.