Question

During the complete oxidation of one sucrose molecule, how many ATP are produced by FADH₂ of the Krebs cycle?
A. 24
B. 8
C. 3
D. 4

Answer 1

Hint: Because of differences in the degree of coupling between the flow of protons through the ATPase and electron transport, the total number of ATP is unknown. Adenosine triphosphate (ATP) is an organic compound made up of phosphate groups, adenine, and the sugar ribose. It is the cell's energy currency.

Complete answer:
Sucrose is a sugar made up of two sugars: glucose and fructose. During cellular respiration, one molecule of glucose can yield 38 ATP molecules. Two molecules of FAD are reduced to $FADH_2$ during the Kreb cycle. 2 $FADH_2$ now generates 2 x 2 = 4 ATP molecules. The hexokinase enzyme converts fructose to fructose-6-phosphate. After that, the fructose-6-phosphate enters glycolysis and produces the same amount of ATP as the glucose molecule. As a result, $FADH_2$ of the Krebs cycle will also create four ATP molecules. As a result, total ATP produced by FADH 2 of the Krebs cycle will be 8 molecules.
As a result, the proper response is '8'.

During aerobic cellular respiration, one molecule of sucrose produces 64 ATP. Explanation: Sucrose is a disaccharide, which means it is made up of two sugar molecules. It has two monosaccharides: one molecule of glucose and one molecule of fructose.

One rotation of the Krebs cycle produces 12 ATP, regardless of whether it is glucose or sucrose. Because there will be four cycles of the Krebs' cycle in sucrose instead of two in glucose, total ATP generation will be two times higher than glucose, which is 76 ATP.

Glycolysis is the process by which all cells in the body generate energy. Glycolysis produces pyruvate in aerobic conditions and lactate in anaerobic conditions. Pyruvate enters the Krebs cycle to produce more energy.

Note:-
In the TCA cycle, each glucose molecule produces two ATPs (2 acetyl CoA). Succinyl CoA synthetase creates ATP when it converts Succinyl CoA to succinate. It's worth noting that oxidative phosphorylation in the electron transport chain accounts for the majority of the ATP produced in cellular respiration.