Coenzymes

Question 0

What is the importance of NAD in respiration?

Answer 0

It operates during GLYCOLYSIS, the LINK reaction, KREBS cycle AND in both ANAEROBIC pathways.

• Accepts a PAIR of H+ and is reduced NAD▶️NADH, when it loses hydrogen ions it is oxidised NADH▶️NAD.

Question 1

What are coenzymes?

Answer 1

REMEMBER: ( Many enzymes require the presence of another non protein/non-catalyst substance in order to function)

• Coenzymes work by binding with the enzyme at the active site.
↪️ (Sometimes it will alter its shape so it can bind more effectively with it’s substrate)

• Can help the enzyme transfer a group of atoms from one molecule to another.

Question 2

What is the importance of Coenzyme A (CoA) in respiration?

Answer 2

• Used to transfer ETHANOATE from LINK reaction to KREBS cycle.
• Acetyl CoA is important for the breakdown of fatty acids.

Structure:
• 3 phosphoryl groups 
• Adenosine 
• Panthothenic acid 
• Cysteine