Co-enzymes in aerobic respiration

Question 1

what is NAD and FAD?

Answer 1

-they are responsible for accepting “high energy” electrons and carrying them ultimately to the electron transport chain where they are used to synthesize ATP molecules.

Question 1

What is co-enzyme A?

Answer 1

Coenzyme A plays the role of an acyl group carrier in the cell

Question 2

Why are co-enzymes are needed?

Answer 2

• They are needed to transfer various groups between different enzyme catalysed reactions

Question 3

What are co-enzymes?

Answer 3

• They are non-protein organic molecules which help enzymes to work

Question 4

What are the 3 co-enzymes involved in aerobic respiration?

Answer 4

• NAD
  -FAD
  Co-enzyme A

Question 5

Where are the co-enzymes NAD and FAD derived from?

Answer 5

• Vitamin B3 in the diet

Question 6

Why do we only need to derive amounts from vitamins?

Answer 6

• the co-enzymes are constantly being re-used
• only small amounts are needed

Question 7

Why do co-enzymes release hydrogen atoms?

Answer 7

• Released to the cristae which is needed for oxidative phosphorylation

Question 8

What is the difference between NAD and FAD?

Answer 8

NAD
- produced in the link reaction, glycolysis and Kreb cycle
- NAD is released to the first carrier in OPP

FAD
- produced in the Kreb cycle
- FAD is released to the second carrier in OPP

Question 9

Why is co-enzyme A needed?

Answer 9

• to carry the 2C aceytl group from the link reaction to the kreb cycle.