NAD+ and FAD
a) are oxidized to form NADH+H+ and FADH2
b) pick up hydrogen and carry it to the electron transport chain
c) are reduced molecules
d) all of these
Study guide question Thank you
this one is b
To determine the correct answer, let's first understand the role of NAD+ (nicotinamide adenine dinucleotide) and FAD (flavin adenine dinucleotide) in cellular respiration.
During cellular respiration, NAD+ and FAD act as electron carriers in the process of oxidative phosphorylation. They play a crucial role in extracting energy from the breakdown of glucose and transferring it to the electron transport chain (ETC).
When NAD+ and FAD accept electrons, they become reduced and pick up hydrogen ions (H+), resulting in the formation of NADH+H+ (reduced form of NAD+) and FADH2 (reduced form of FAD).
So, considering the options given:
a) NAD+ and FAD are indeed oxidized to form NADH+H+ and FADH2, as mentioned above.
b) This statement is correct. NAD+ and FAD pick up hydrogen ions and carry them to the electron transport chain for energy production.
c) The reduced forms of NAD+ and FAD, i.e., NADH+H+ and FADH2, are indeed reduced molecules.
d) Based on the explanations above, all of these options (a, b, and c) are correct.
Therefore, the correct answer is d) all of these. Both NAD+ and FAD are oxidized to form NADH+H+ and FADH2, pick up hydrogen ions to carry them to the electron transport chain, and are reduced molecules.