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)
2.Number of oxygen molecules required for glycolytic breakdown of one glucose molecule is
(A) Three
(B) Zero
(C) Thirty eight
(D) Six
Answer: (B)
3.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)
4.Protoplasmic repiration is respiration
(A) Occuring in protoplasm
(B) Occuring in cytoplasm
(C) when protein is respiration substrate
(D) Occuring outside mitochondria
Answer: (C)
5.Oxidation of a molecule of acetyl Co-A produces
(A) 12 ATP
(B) 15 ATP
(C) 6 ATP
(D) 24 ATP
Answer: (C)
6.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)
7.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)
8.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)
9.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)
10.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)
11.The organic acid formed last in aerobic respiration is
(A) Citric acid
(B) Pyruvic acid
(C) Oxaloacetic acid
(D) Phosphoglyceric acid
Answer: (C)
12.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)
13.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)
14.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)
15.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)
16.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)
17.Connectin link between EMP pathway and TCA cycle is
(A) Pyruvic acid
(B) Citric acid
(C) Acetyl CO-A
(D) Oxalosuccinic acid
Answer: (C)
18.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)
19.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)
20.Terminal oxidation means
(A) Electron transport
(B) Synthesis of ATP
(C) Formation of water
(D) Dehydrogenation of reaction
Answer: (C)
21.Which of the folowing is mirochondrial stain
(A) Gimsa green
(B) Jenus Green B
(C) Crystel Voilet
(D) Jenus Green A
Answer: (B)
22.The reaction converting pyruvate to acetyl CO-A is
(A) Decarboxylation
(B) Dehydrogenation
(C) Oxidative decarboxylation
(D) Both (A) and (B)
Answer: (C)
23.In mitochondria F1 particles are placed at a distance
(A) 40° A
(B) 50°A
(C) 80° A
(D) 100° A
Answer: (D)
24.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)
25.Removal of hydrogen and formation of ATP are commonly called as
(A) Phosphorylation
(B) Dephosphorylation
(C) Dehydrogenation
(D) Oxidative phosphorylation
Answer: (D)
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