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MDCAT Biology Chapter 2 Bio-energetic Online Test MCQs With Answers

Question # 1

In Glycolysis the net gain is 2 ATP and 2 molecules of

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NADH₂

FADH₂

FMNH₂

FAD

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Question # 2

Which of the following occurs in the first step of payoff phase during glycolysis

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Reduction of 1 NAD

Oxidation of 2 NAD

Reduction of 2 NAD

Oxidation of 1 NAD

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Question # 3

Fermentation is

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Incomplete oxidation of proteins

Complete oxidation of carbohydrates

Aerobic respiration

Incomplete oxidation of carbohydrates

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Question # 4

The final acceptor of electrons in respiratory chain is

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Cyt. a

Cyt. a3

Water

Oxygen

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Question # 5

In Krebs cycle hydration occurs during the conversion of

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Citrate into isocitrate

Malate into fumarate

Citrate into malate

Fumarate into malate

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Question # 6

How much energy present in chemical bonds of glucose converted into ATP

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10%

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Question # 7

Most of the energy in the cell is liberated by oxidation of carbohydrates when

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Glucose is converted intoalcohol and CO2

Sugar is converted into pyruvic acid

Pyruvic acid is converted into CO₂ and H₂O

Pyruvic acid is converted into CoA

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Question # 8

Cytochrome b is oxidized by ___ in respiratory chain

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Coenzyme Q

Cytochrome c

Cytochrome a

Oxygen

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Question # 9

Which of the following is correct direction showing the pumping of protons in chemiosmosis

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From stroma to lumen in chloroplast

From matrix to intermembrane space in mitochondria

From intermembrane space to matrix in mitochondria

Both A and B

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Question # 10

In krebs cycle, oxidation takes place in the formation of ___ without decarboxylation

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Succinate

Ketoglutarate

Malate

Fumrate

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Question # 11

In this process a carbon dioxide molecule is released

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Lactic acid fermentation

Alcoholic fermentation

Glycolysis

Hydrolysis of glycogen

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