Question

How is energy harvested in the cyclization of NAD+ and NADH?

A) Through the transfer of electrons
B) Through the release of ATP
C) Through the formation of high-energy bonds
D) Through the production of heat

Answer 1

Energy during the cyclization of NAD+ and NADH is harvested through the transfer of electrons during cellular respiration, and it is essential for energy production and transfer within the cell.

Step-by-step explanation:

The energy in the cyclization of NAD+ and NADH is harvested through the transfer of electrons. This process is part of cellular respiration, particularly the Krebs cycle, also known as the citric acid cycle. During this cycle, the oxidation of NAD+ to NADH releases energy. The energy from the breakdown of glucose and other molecules in animals is carried by NADH to other parts of cellular respiration. Similarly, in the light-dependent reactions of photosynthesis, energy is absorbed and stored in NADPH. Later, when NADH and FADH are oxidized, the energy released is used to produce more ATP, the cell's energy currency. This entire process is crucial for the production and transfer of energy within the cell.