Respiration Questions: Paper – 02

Sr. No.

Questions

Answers

1.

Total number of water molecules produced per molecule of glucose during aerobic respiration is

(A) 10

(B) 6

(C) 12

(D) 8

Answer: (B)

Number of oxygen molecules required for glycolytic breakdown of one glucose molecule is

(A) Three

(B) Zero

(C) Thirty eight

(D) Six

Answer: (B)

In aerobic respiration, first CO₂ is liberated during

(A) Oxidation of pyruvic acid

(B) Decarboxylation of oxalosuccinic acid

(C) Decarboxylation of a ketoglutaric acid

(D) Alcoholic fermentation

Answer: (A)

Protoplasmic repiration is respiration

(A) Occuring in protoplasm

(B) Occuring in cytoplasm

(C) when protein is respiration substrate

(D) Occuring outside mitochondria

Answer: (C)

Oxidation of a molecule of acetyl Co-A produces

(A) 12 ATP

(B) 15 ATP

(C) 6 ATP

(D) 24 ATP

Answer: (C)

Incomplete breakdown of sugars in anaerobic respiration forms

(A) Glusoce and CO₂

(B) Alcohol and CO₂

(C) Water and CO₂

(D) Sucrose and water

Answer: (B)

The number of molecules of pyruvic acid formed from one molecule of glucose at the end of glycolysis is

(A) 1

(B) 2

(C) 3

(D) 4

Answer: (B)

Oxysome is made up of

(A) Stalk, head piece and tail piece

(B) Stalk, head piece and base piece

(C) Head as basal piece

(D) Stalk and head piece

Answer: (B)

FADH₂ is formed in conversion of

(A) Succinyl CO-A succinic acid

(B) Succinic acid-fumaric acid

(C) Fumaric acid-malic acid

(D) Isocitric acid-oxalosuccinic acid

Answer: (B)

Muscle cell starved of oxygen and supplied with pyruvic acid will produce

(A) CO₂ only

(B) Lactic acid

(C) Ethonal

(D) CO₂ and H₂O

Answer: (B)

The organic acid formed last in aerobic respiration is

(A) Citric acid

(B) Pyruvic acid

(C) Oxaloacetic acid

(D) Phosphoglyceric acid

Answer: (C)

As compared to anaerobic respiration the energy gained during aerobic respiration is ______ more

(A) 6 times

(B) 12 times

(C) 18 times

(D) 19 times

Answer: (D)

Which is key intermediate compound linking glycolysis to Kreb’s cycle?

(A) Malic acid

(B) Acetyl Co-A

(C) Pyruvic acid

(D) Citric acid

Answer: (B)

In TCA cycle, GTP is formed during conversion of

(A) Succinyl Co-A into succinic acid

(B) a-ketoglularic acid to succinyl CO-A

(C) Succinic acid to fumaric acid

(D) Both (A) and (B)

Answer: (A)

Process of respiration in green plants takes place

(A) only when photosynthesis is in open

(B) Only when stomata are open

(C) Only when photosynthesis cease

(D) All the times

Answer: (D)

Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is known as

(A) TCA pathway

(B) HMS pathway

(C) HSK pathway

(D) EMP pathway

Answer: (D)

Connectin link between EMP pathway and TCA cycle is

(A) Pyruvic acid

(B) Citric acid

(C) Acetyl CO-A

(D) Oxalosuccinic acid

Answer: (C)

If 5 molecules of glucose respired aerobically and another 5 molecules anaerobically, how many ATP and CO₂ are expected to form?

(A) 200 ATP and 60 CO₂

(B) 140 ATP and 40 CO₂

(C) 200 ATP and 40 CO₂

(D) 190 ATP and 36 CO₂

Answer: (C)

An organic acid which undergoes both dehydrogenation and decarboxylation in Kreb’s cycle

(A) Sucinic acid

(B) a-ketoglytatric acid

(C) Citric acid

(D) malic acid

Answer: (B)

Terminal oxidation means

(A) Electron transport

(B) Synthesis of ATP

(C) Formation of water

(D) Dehydrogenation of reaction

Answer: (C)

Which of the folowing is mirochondrial stain

(A) Gimsa green

(B) Jenus Green B

(C) Crystel Voilet

(D) Jenus Green A

Answer: (B)

The reaction converting pyruvate to acetyl CO-A is

(A) Decarboxylation

(B) Dehydrogenation

(C) Oxidative decarboxylation

(D) Both (A) and (B)

Answer: (C)

In mitochondria F₁ particles are placed at a distance

(A) 40° A

(B) 50°A

(C) 80° A

(D) 100° A

Answer: (D)

The reaction which brings about formation of 3 PGA in the glycolysis involves

(A) Dephosphorylation

(B) Cleavage

(C) Oxidative phosphorylation

(D) Oxidative decarboxylation

Answer: (A)

Removal of hydrogen and formation of ATP are commonly called as

(A) Phosphorylation

(B) Dephosphorylation

(C) Dehydrogenation

(D) Oxidative phosphorylation

Answer: (D)