Question

The number of ATPs per NADH generated by the electron transport system is higher than the number generated per FADH2 because __________. The number of ATPs per NADH generated by the electron transport system is higher than the number generated per FADH2 because __________. NADH is converted to NAD , which increases the charge gradient for ATP synthesis FADH2 has a higher (more negative) redox potential than NADH does electrons from FADH2 are not oxidized all the way to water FADH2 has a lower (less negative) redox potential than NADH does

Answer 1

The number of ATP molecules produced per NADH is higher than the number generated per FADH2 in the electron transport system.

Step-by-step explanation:

The number of ATP molecules produced per NADH is higher than the number generated per FADH2 because NADH enters the electron transport chain at Complex I and proceeds through Complexes III and IV, whereas FADH2 enters at Complex II before proceeding to Complexes III and IV. NADH produces three ATP molecules, while FADH2 produces two ATP molecules. This difference in ATP production is due to the location at which the electrons from NADH and FADH2 enter the electron transport chain.

Answer 2

FADH2 has a lower (less negative) redox potential than NADH does

Step-by-step explanation:

Flavin Adenine Dinucleotide (FAD) and Nicotinamide Adenine Dinucleotide (NAD) are redox cofactors that play important functions for mitochondrial activity and cellular redox balance. Both coenzymes exist in two forms: an oxidized and a reduced, which are abbreviated as NAD/FAD and NADH/FADH2, respectively. These reduced forms (NADH and FADH2) are produced in the Krebs cycle during respiration. FADH2 has lower redox potential than NADH because FADH2 is only capable of activating 2 proton pumps, while NADH can activate 3 proton pumps during the electron transport chain, thereby FADH2 generates a minor number of ATP molecules than NADH.