BC2002 sample MCQ 1

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Last updated 9:24 PM on 4/28/26
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10 Terms

1
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B) Autotrophs

Which ONE of the following systems synthesizes all of its molecules from CO2

A) Chemotrophs

B) Autotrophs

C) Mammalian

D) None of the above

2
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B) is endergonic and C) proceeds in reverse

If the ΔG^’0 value of a biochemical reaction is 25 under standard conditions the reaction:

A) Is at equilibrium

B) Is endergonic

C) Is exergonic

D) Is inhibited

3
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B) Oxidative and convergent

Catabolic pathways are which ONE of the following:

A) Reductive and divergent

B) Oxidative and convergent

C) Oxidative and divergent

D) Reductive and convergent

E) Reductive and oxidative

4
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C) -3 kJ/mol

If the ΔG^’0 of biochemical reaction 1 is +5 kJ/mol and a coupled reaction 2 has a ΔG^’0 value of -8 kJ/mol what is the overall ΔG^’0 for this coupled reaction?

A) 13 kJ/mol

B) 3 kJ/mol

C) -3 kJ/mol

D) -13 kJ/mol

E) 10 kJ/mol

5
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B) -31 kJ/mol

Which of the following values is the nearest approximation of the ΔG^’0 value for the ATP hydrolysis and energy transfer?

A) -300 kJ/mol

B) -31 kJ/mol

C) -13 kJ/mol

D) -3000 kJ/mol

E) -30,000 kJ/mol

6
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C) Adenine, 3 phosphates and a ribose

ATP consists of which of the following

A) Guanine, 2 phosphates and a ribose

B) Adenine, 2 phosphates and a ribose

C) Adenine, 3 phosphates and a ribose

D) Cytosine, 3 phosphates and a ribose

E) None of the above

7
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A) Phosphoanhydride

ATP is hydrolysis at which of the following bond types?

A) Phosphoanhydride

B) Thiol

C) Carboxylic acid anhydride

D) Phosphodiesterase

E) Hydroxide

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C) The nicotinamide ring

Which of the following components of NAD accepts a hydride ion

A) The niacin ring

B) Adenine

C) The nicotinamide ring

D) Ribose

E) The dinucleotide

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B) A is oxidized and B is reduced

What happens in the following reaction AH2 + B —> A + BH2

A) A is reduced and B oxidized

B) A is oxidized and B is reduced

C) Electrons are added to A

D) Electrons are removed from B

E) None of the above

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E) Riboflavin

FAD is derived from which ONE of the following?

A) Vitamin E

B) Niacin

C) Nicotinamide

D) Acetyl-CoA

E) Riboflavin