Calculate NO. of ATP produced from ( 1 mole of )given below molecules...
1. Sucrose
2. PGAL
3. Acetyl Co.A
4. Pyruvic acid
5. Maltose
6. Fructose
Answers
1) Sucrose is made up of a glucose and a fructose molecule. The oxidation of that 1 glucose through the glycolysis and Krebs-cycle produces 36 or 38 molecules of ATP
2) Glycolysis of one molecule of glucose produces 2 PGAL, thus of three molecules will produce 6 PGAL. Respiration of one molecule of glucose or 2 PGAL produces 38 ATP molecules, thus, of 6 PGAL will produce 114 ATP molecules.
3)Each acetyl CoA enters into citric acid cycle and yields 3 NADH2 (9 ATP), 1 FADH2 (2 ATP) and 1 GTP (1 ATP). Therefore, altogether 12 ATP molecules will be produced from each mole of acetyl-CoA.
4)One molecule of FADH2 produces 2 ATP molecules in ETS. Four molecules of NADH produces 4 x 3 = 12 molecules of ATP. Also, 1 molecule of ATP is produced by substrate level phosphorylation. Hence, total number of ATP molecules produced by 1 molecule of pyruvic acid during Krebs cycle = 12+2+1 = 15
5) don't know...
6)When fructose is converted into glucose in the liver it consumes 2 ATP. When this newly synthesized glucose is subsequently oxidized in skeletal muscle, the overall metabolic pathway uses 6 O2 and 4 ATP and produces 6 CO2 and 29.5 ATP for each fructose molecule, representing a net gain of 25.5 ATP, or 4.25 ATP/oxygen.
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