Question

During ETC and oxidative phosphorylation, could the following increase the rate of ATP synthesis?

Part 1 "Increasing the proton gradient across the mitochondrial inner membrane" Yes or No

Part 2 "Increasing the concentration of protons in the mitochondrial matrix" Yes or No

Part 3 "Increasing the amount of NADH in the cell" Yes or No

Part 4 "Decreasing the amount of oxygen available to the cell" Yes or No

Answer 1

ANSWER:

Part:

1. Yes, because more the proton gradient across the mitochondrial inner membrane more protons will pass through the ATP synthase complex and more will be the rate of ATP synthesis.

2. No, because this will decrease the proton gradient across the mitochondrial inner membrane, with out which ATP synthase cannot synthesise ATP.

3. Yes, because it is the NADH and FADH2 which donate electrons to the Electron Tansport Chain (ETC), which are used by it to generate Proton gradient across the mitochondrial inner membrane.

4. No, because oxygen is necessary for keeping the ETC working as it is the oxygen which finally takes the electrons donated by the NADH and FADH2 .