In respiration, the following are electron transporters:Group of answer choicesNADH, FADH2NAD+, FADATPADP

In the process of respiration, the electron transporters are NADH and FADH2.

Here's a step-by-step explanation:

1. Glycolysis: This is the first step of cellular respiration, which occurs in the cytoplasm. In this process, one molecule of glucose (a six-carbon sugar) is broken down into two molecules of pyruvate (a three-carbon compound). During glycolysis, NAD+ is reduced to NADH.

2. Krebs Cycle (Citric Acid Cycle): This is the second step of cellular respiration, which occurs in the mitochondria. The pyruvate from glycolysis is further broken down, and more NADH is produced. In addition, FAD+ is reduced to FADH2.

3. Electron Transport Chain: This is the final step of cellular respiration, which also occurs in the mitochondria. The NADH and FADH2 produced in the previous steps donate their electrons to the electron transport chain. This flow of electrons leads to the production of ATP, the energy currency of the cell.

So, NADH and FADH2 are the electron transporters in respiration. NAD+ and FAD are their oxidized forms, while ATP and ADP are involved in the energy transfer, not electron transport.