Identify A & B in this condensed scheme of glycolysis

A - DHAP, B- 2-Phosphoglyceric acid

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A- Glucose-6-phosphate, B- Pyruvic acid

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A - 1, 3-bisphosphoglyceric acid, B - Pyruvic acid

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A- Fructose-1, 6-bisphosphate, B - PEP

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(A) 2-Phosphoglycerate, (B) Pyruvic acid

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Solution

The correct option is C
A - 1, 3-bisphosphoglyceric acid, B - Pyruvic acid

In glycolysis, glyceraldehyde-3-phosphate undergoes oxidation and forms 1,3-bis phosphoglyceric acid in the preparatory phase. In this reaction $N A D^{+}$ is reduced to NADH and $H^{+}$ . In the last step, phosphoenol pyruvate is dephosphorylated to pyruvic acid. In this reaction, phosphate is transferred to ADP to form ATP in payoff phase. Therefore the correct answer is 1,3-biophosphoglycerate and pyruvate or pyruvic acid.

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	Steps	ATP Utilisation	ATP Production
1.	$G l u c o s e \to G l u c o s e - 6 - p h o s p h a t e$	P	X
2.	$F r u c t o s e - 6 - p h o s p h a t e \to F r u c t o s e - 1, 6 - b i s p h o s p h a t e$	1	Q
3.	$1, 3 - b i s p h o s p h o g l y c e r i c a c i d \to 3 - P h o s p h o - g l y c e r i c a c i d$	X	R
4.	$2 - P h o s p h o e n o l p y r u v i c a c i d \to P y r u v i c a c i d$	S	2

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