Question

Which is correct about the electron transport chain (ETC) in the mitochondria?
A) It will oxidize the electron carrier NADH
B) The ETC pumps protons to reduce NAD+ to make NADH
C) Oxygen is generated during the ETC
D) It is found in the matrix
E) The ETC will generate ATP from ADP + Pi

Answer 1

Answer:

For the given question the correct answer out of the four given options is

option A) It will oxidize the electron carrier NADH

Explanation:

In Electron Transport Chain, abbreviated as ETC, to produce energy, four protein complexes helps in the oxidation of $FADH_{2}$ and NADH. This energy is required in ETC to produce ATP. Here, the electron carriers are NADH and  $FADH_{2}$. The electron movement through these 4 proton layers results in the driving of electrons in between the membrane spacing into the cytosol which in turn results in occurrence of negative charge in the matrix and equal positive charge the inter-membrane spacing.

Due to the charge difference, electro-chemical gradient, responsible for synthesis of ATP is developed.