Question

Which of the following is NOT correct about substrate level phosphorylation and oxidative phosphorylation?

A. oxidative phosphorylation occurs absence of molecular oxygen

B. substrate level phosphorylations use ADP as a substrate

C. substrate level phosphorylations requires molecular oxygen

D. both substrate level phosphorylation and oxidative phosphorylation produce ATP as a product

E. substrate level phosphorylations only take

place in the mitochondria

I believe the answer is D, please verify & explain. Thank you

Answer 1

The answer is may not be D because the substrate level phosphorylation and oxidative phosphorylation both produce ATP as a product. Oxidative phosphorylation produce ATP more efficiently than substrate level phosphorylation.
As we have to choose incorrect statements, the answer is A, C and E
Substrate level phosphorylation does not require molecular oxygen, it uses ADP as a substrate and transfers phosphoryl group to ADP which results in the formation of ATP.
The oxidative phosphorylation does not occur in the absence of oxygen, as the oxygen is the electron acceptor, the electron transport chain stops and therby ATP is not produced.
Substrate level phosphorylation occurs in the cytoplasm of the cell during glycolyisis and mitochondria of the cell during the Krebs cycle.