Respiration in Plants

Oxidative decarboxylation of pyruvic acid results in the formation of

I. Acetyl CoA 

II. CO₂ 

III. ATP

IV. NADH + H⁺

• I only

• I and II only

• I, II and III only

• I, II and IV only

• I, II and IV only

Select the correct order of reactions in glycolysis

(A) Conversion of 3-phosphoglyceraldehyde to 1,3-bisphosphoglycerate

(B) Conversion of 3-phosphoglyceric acid to 2- phosphoglycerate 

(C) Conversion of BPGA to 3 phosphoglyceric acid 

(D) Splitting of fructose 1, 6 bisphosphate into dihydroxy acetone phosphate and 3-phosphoglyceraldehyde

• (D), (C), (A), (B)

• (B), (C), (A), (B)

• (B), (D), (C), (A)

• (A), (D),(C), (B)

• (A), (D),(C), (B)

FAD is electron acceptor in the citric acid cycle during the oxidation of

• Malic acid to oxaloacetic acid

• Succinic acid to malic acid

• Citric acid to alpha-ketoglutaric acid

• Alpha-ketoglutaric acid to succinic acid

• Alpha-ketoglutaric acid to succinic acid

In which one of the following reactions of glycolysis, oxidation takes place?

• Glucose 6-phosphate to fructose 6-phosphate

• Fructose 6-phosphate to fructose 1, 6-bisphosphate

• 1, 3-bisphosphoglycerate to 3-phosphogyceric acid

• 3-phosphoglyceraldehyde to 1, 3-bisphosphoglycerate

• 3-phosphoglyceraldehyde to 1, 3-bisphosphoglycerate

Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by

• Hexokinase

• Enolase

• Phosphofructokinase

• Aldolase

Assertion: Glucose is the favoured respiratory substrate.

Reason: When glucose is used as respiratory substrate it is completely oxidised and RQ is 1.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false

• If both assertion and reason are false.