131.  R.Q. is maximum when respiratory substrate is

A. Glucose

B. Fat

C. Protein

D. Malic acid.

Answer : Option D

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132.  End product of citric add/Krebs cycle is

A. Citric acid

B. Lactic acid

C. Pyruvic acid

D. \(CO_2\) \(+H_2O\)

Answer : Option D

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133.  Krebs cycle is

A. Oxidation of glucose to alcohol and water

B. Oxidation of acetyl CoA to carbon dioxide and water involving electron transport

C. Complete oxidation of acetyl CoA without electron transport

D. Complete reduction of acetyl CoA to carbon dioxide and water.

Answer : Option C

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134.  Most of the biological energy is supplied by mitochondria through

A. Breaking of proteins

B. Reduction \(NADP^+\)

C. Breaking of sugars

D. Oxidising TCA substrates.

Answer : Option D

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135.  Which one is a product of glycolysis, besides 2 ATP ?

A. FAD

B. NADH

C. NAD

D. NADP

Answer : Option B

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136.  The site of Krebs cycle in bacteria is

A. Nucleoid

B. Cytoplasm

C. Plasma membrane

D. Ribosomes

Answer : Option C

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137.  Which is the product of aerobic respiration?

A. Malic acid

B. Ethyl alcohol

C. Lactic acid

D. Pyruvic acid

Answer : Option A

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138.  Which one can respire in the absence of oxygen ?

A. Seeds

B. Leaves

C. Stem

D. Root

Answer : Option A

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139.  Lactic acid fermentation does not produce

A. ATP

B. \(CO_2\) and NADH

C. \(CO_2\)

D. NADH

Answer : Option B

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140.   Electron transport system of mitochondria is located in

A. Outer membrane

B. Inner membrane

C. Inter-cristal space

D. Outer chamber.

Answer : Option B

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