How many ATP can be produced from one glucose molecules?

Answer 1

Answer:

32 molecules of ATP ( net gain ).

Explanation:

2 molecules of ATP - in Glycolysis ( net gain ).

2 molecules of ATP - in Krebs Cycle.

28 molecules of ATP - in Electron Transport Chain.

- 1 NADH produces x2.5 ATP ( there are 10 NADH produced )

- 1 FADH2 produces x1.5 ATP ( there are 2 FADH2 produced )

Total: 2 + 2 + 2.5x10 + 1.5x2-> 4 + 28 = 32 molecules of ATP
The energy payoff phase, yield energy for the cell. In this phase, two NADH molecules are produced for each initial glucose molecule, and four ATP molecules are generated. Since the first phase uses two molecules of ATP, the net gain to the cell is two ATP molecules for each glucose molecules that enters glycolysis.

Answer 2

38 ATP. Catabolism of fructose may take one of two pathways.

Both pathways yields an identical amount of ATP to glucose. (2 ATP via glycolysis + 36 via Oxidative phosphorylation = 38 total ATP). The first pathway starts with phosphorylation by hexokinase of fructose to fructose-6-phosphate--an intermediate in glycolysis.

The other pathway is the fructose 1-phosphate pathway, which occurs in the liver and starts with phosphorylation of fructose to fructose-1-phosphate which is then broken into Glyceraldehyde Phosphate and DHAP by aldolase. GP is phosphorylated into G3P. This pathway skips the rate limiting and regulatory step of phosphofructokinse.

Answer 3

38 molecules of ATP are produced by one molecule of sugar.

Answer 4

38