Which is the first reaction of the pentose phosphate pathway?

How many molecules of glucose-6-phosphate are regenerated in pentose-phosphate pathway?

A

3

B

2

C

5

D

4

What is the first reaction of the pentose phosphate pathway?

A

Oxidation of glucose 6-phosphate to 6-phosphoglucono-δ-lactone

B

Oxidation of 6-phosphogluconate to ketopentose ribulose 5-phosphate

C

Reduction of 6-phosphoglucono-δ-lactone to glucose 6-phosphate

D

Reduction of ketopentose ribulose 5-phosphate to 6-phosphogluconate

Which of the following fertilisers are covered under the Government of India's Nutrient Based Subsidy scheme? 1. Diammonium Phosphate (DAP) 2. Monoammonium Phosphate (MAP) 3. Triple Super Phosphate (TSP) 4. Single Super Phosphate (SSP) fertilizers Select the correct answer using the codes given below.

A

1 and 2 only

B

1 only

C

2 and 3 only

D

1, 2, 3 and 4

For the reaction, A = X + Y, the respective concentrations are C_A, C_X and C_Y. The forward reaction rate constant is kf and the backward reaction rate constant is kb. Choose the correct statement from the following:
P. At equilibrium, kf C_A > k_B CxCy
Q. If the reaction is irreversible than, kb C_XC_Y = 0
R. The backward reaction rate will essentially be first order, if the forward reaction rate is first order.
S. Activation energy for the first order forward reaction will be independent of temperature.

A

P, Q

B

Q, R

C

R, S

D

Q, S

First reduction in pentose phosphate pathway is

A

Oxidation of 6-phosphogluconate

B

Oxidation of fructose 6-phosphate

C

Oxidation of glucose 6-phosphate

D

Oxidation of fructose 5-phosphate

Which of the following enzymes acts in the pentose phosphate pathway?

A

6-phosphogluconate dehydrogenase

B

Pyruvate kinase

C

Glycogen phosphorylase

D

Aldolase

Which of the following statements is correct about oxidative pentose phosphate pathway?

A

It generates NADH

B

It oxidizes NADPH to NADP+

C

The pathway supplies ribose 5-phosphate and NADPH in the quantities the cell requires

D

Glucose 6-phosphatase catalyzes the rate limiting reaction of the pathway

Which one out of the following enzymes acts in the pentose phosphate pathway?

A

Aldolase

B

Glycogen phosphorylase

C

Pyruvate kinase

D

6-phosphogluconate dehydrogenase

Which one of the following statements is correct about the pentose phosphate pathway?

A

It generates 6 moles of CO2 for each mole of glucose consumed

B

It generates 38 mol of ATP per mole of glucose consumed

C

It is a reductive pathway that consumes NADH

D

Present in plants but not in animals

Which of the following statements is correct about the reductive pentose phosphate pathway?

A

It is not reversible

B

Transketolase transfers 3 carbon units

C

Transaldose transfers 2 carbon units

D

Pentoses can provide glycolytic intermediates

Which is the first reaction of the pentose phosphate pathway?

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