As the protons move down their concentration gradient in the electron transport chain, what's happening with the electrons in the chain?

Question

Question 3 options:

A)

They take a phosphate group off ATP.

B)

They combine with oxygen to form water.

C)

They split apart from oxygen.

D)

They convert ADP to ATP.

Answer 1

The correct answer is:

B) They combine with oxygen to form water.

In the electron transport chain, as protons (H+ ions) move down their concentration gradient and are pumped across the mitochondrial membrane, electrons are passed along the chain and ultimately combine with oxygen at the end of the process to form water.