Question

NADH is a major energy carrier molecule. Which of the following is a common way the cell ises this energy and to make ATP?

a oxidative phosphorylation

b photophosphorylation

c substrate level phosporylation

d all of these are correct

Answer 1

Ans:

a. Oxidative phosphrylation.

Explanation: Oxidative phosphorylation is the process of cellular respiration where electron released from the NADH and FADH2  are transferred to O2, forming H2O.. The free energy released during the oxidation of NADH and FADH2 is used to formation of ATP.

NADH + H+ + 1/2 O2  → NAD+ + H2O

Photophosphorylation is a process where ATP is produced by the utilization of extra light energy (electron) from photosynthsis and NADP+ is the final electron acceptor of this process. So, NADPH+H+ and ATP is the final product of this process.

Substrate-level phosphorylation is a process where ATP is produced by the conversion of high energy substrate to a low energy product.