Rate limiting step in glycolysis is

Glucose to glucose 6-phosphate

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Fructose 6- phosphate to fructose 1,6-diphosphate

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Glyceraldehydde -3 phosphate to 3-phosphoglyceric acid

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Both A and B

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Solution

The correct option is C Both A and B
The rate limiting steps of a metabolic pathway are that reaction which regulates the pathway by feedback mechanism. The rate limiting steps in the glycolytic pathway are:
(i) The phosphorylation of glucose by hexokinase or glucokinase.
(ii) The phosphorylation of fructose-6-phosphate to form fructose-1,6-bisphosphate by fructose-6-phosphate kinase.
(iii) The conversion of phosphoenolpyruvate to pyruvate by pyruvate kinase.
Thus, the correct answer is option D.

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Similar questions

Q. Choose the steps of glycolysis where substrate level phosphorylation occurs:
(a) Glucose

\to

Glucose-6-phosphate
(b)

1, 3

-bisphosphoglyceric acid

\to

3-Phosphoglyceric acid
(c)

1, 3

-bisphoglyceraldehyde

\to

1, 3,

-bisphosphoglyceric acid
(d) Phosphoenolpyruvate

\to

Pyruvate
(e) Fructose-6-phosphate

\to

Fructose-

1, 6

-bisphosphate

Q. In Glycolysis, conversion of glucose-6-phosphate to fructose-6-phosphate is

Q. During glycolysis, the direct conversion of fructose-6-phosphate from glucose can be done, but first of all the glucose is converted into glucose-6-phosphate and then to fructose-6-phosphate..

Why ?

	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. Match List I with List II and select the correct answer.

List-I (Enzyme)	List-II( Conversions)
a. Phosphogluco isomerase	$1$ . Fructose $\to$ Glucose
b. Triose phosphate isomerase	$2$ . Glucose $\to$ Glucose- $6$ -Phosphate
c. Fructose diphosphate aldolase	$3$ . Glucose- $6$ -phosphate $\to$ Fructose- $6$ -phosphate
d. Hexokinase	$4$ . Glyceraldehydes- $3$ -phosphate $\to$ Dihydroxy acetone phosphate
	$5$ . Fructose- $1$ , $6$ -diphosphate $\to$ Glyceraldehydes- $3$ -phosphate

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