CELL RESPIRATION
GLYCOLYSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Dehydrogenase
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Aldolase
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Kinase
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Isomerase
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Detailed explanation-1: -Enzyme that catalyses this reaction is Diphosphoglyceraldehyde dehydrogenase.
Detailed explanation-2: -Glyceraldehyde 3-phosphate dehydrogenase (GAPDH) is a glycolytic protein responsible for the conversion of glyceraldehyde 3-phosphate (G3P), inorganic phosphate and nicotinamide adenine dinucleotide (NAD(+)) to 1, 3-bisphosphoglycerate (1, 3-BPG) and the reduced form of nicotinamide adenine dinucleotide (NADH).
Detailed explanation-3: -Glyceraldehyde 3-phosphate dehydrogenase (GAPDH) catalyses the conversion of glyceraldehyde 3-phosphate (G3P) to 1, 3-bisphosphoglycerate (1, 3BPG) during glycolysis, as well as the reverse of this reaction during gluconeogenesis.
Detailed explanation-4: -In this reaction cycle 1, 3BPG originates from 3-phosphoglycerate and is made into glyceraldehyde 3-phosphate by the action of specific enzymes. Contrary to the similar reactions of the glycolytic pathway, 1, 3BPG in the Calvin cycle does not produce ATP but instead uses it.
Detailed explanation-5: -The standard free-energy change for the conversion of GAP to 1, 3-BPG is 6.3 kJ/mol or 1.5 kcal/mol (15). Coupling its reaction to the thiohemiacetal intermediate lowers this reaction’s standard free energy.