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Byju's Answer
Standard XII
Biology
Glycolysis Payoff Phase
Direct ATP sy...
Question

Direct ATP synthesis in glycolysis occurs during conversion of ____i____ and ____ii____ into ____iii____ and ____iv____ respectively.

A
i: Glucose-6-phosphate, ii: Fructose-6-phosphate, iii: Fructose-1,6-biphosphate, iv: 3-phosphoglyceric acid
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B
i: Fructose-6-phosphate, ii: Glucose-6-phosphate, iii: Fructose-1,6-biphosphate, iv: 2-phosphoglycerate
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C
i: 1,3-bisphosphoglycerate, ii: Phosphoenolpyruvate, iii: 3-phosphoglycerate, iv: Pyruvate
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D
i: 1,3-bisphosphoglycerate, ii: 3-phosphoglycerate, iii: Phosphoenolpyruvate, iv: 2-phosphoglyceric acid
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Solution

The correct option is C i: 1,3-bisphosphoglycerate, ii: Phosphoenolpyruvate, iii: 3-phosphoglycerate, iv: Pyruvate
Glycolysis is a pathway in which the breakdown of glucose to pyruvic acid occurs. It results in partial oxidation of glucose. It occurs in both aerobic and anaerobic organisms. Direct ATP synthesis in glycolysis occurs during conversion of 1,3-bisphosphoglycerate and phosphoenolpyruvate into 3-phosphoglycerate and pyruvate respectively. The steps of glycolysis is shown below:


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Q. Choose the steps of glycolysis where substrate level phosphorylation occurs:
(a) Glucose → Glucose-6-phosphate
(b) 1,3-bisphosphoglyceric acid → 3-Phosphoglyceric acid
(c) 1,3-bisphoglyceraldehyde → 1,3,-bisphosphoglyceric acid
(d) Phosphoenolpyruvate → Pyruvate
(e) Fructose-6-phosphate → Fructose-1,6-bisphosphate
Q. Select the correct order of reactions in glycolysis.
I. Conversion of 3 phosphoglyceraldehyde to 1, 3 bisphosphoglycerate.
II. Conversion of 3 phosphoglyceric acid to 2 phosphoglycerate.
III. Conversion of 1, 3-BPGA to 3 phosphoglyceric acid.
IV. Splitting of fructose 1, 6-bisphosphate into dihydroxy acetone phosphate and 3 phosphoglyceraldehyde.

Q.
List I List II
A Hexokinase 1 Conversion of fructose-6-phosphate to fructose-1-6-diphosphate
B Triose phosphate dehydrogenase 2 Conversion of glucose to glucose-6-phospahte
C Phosphoglyceromutase 3 Conversion of 1, 3-diphosphoglyceraldehyde to 1, 3-diphosphoglyceric acid
D Phosphofructokinase 4 Conversion of 3-phosphoglyceric acid to 2-phosphoglyceric acid
Match the above lists and choose the correct option.
Q. In EMP pathway,ATP is directly formed in the conversion of
I)Fructose 1 , 6 -bisphosphate to glyceraldehyde -3-phosphate
II)Phosphoenolpyruvate to pyruvate acid
III)1 , 3 -bisphosphoglyceric acid to 3-phosphoglyceric acid
IV)3-phosphoglyceric acid to 2-phosphoglyceric acid
The correct combination is
Q. Match List I with List II and select the correct answer.
List-I (Enzyme)List-II( Conversions)
a. Phosphogluco isomerase1. Fructose→ Glucose
b. Triose phosphate isomerase2. Glucose→ Glucose-6-Phosphate
c. Fructose diphosphate aldolase3. Glucose-6-phosphate→Fructose-6-phosphate
d. Hexokinase4. Glyceraldehydes-3-phosphate→ Dihydroxy acetone phosphate
5. Fructose-1, 6-diphosphate→ Glyceraldehydes-3-phosphate

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Glycolysis Payoff Phase
Standard XII Biology
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