Biochemistry Questions and Answers – ATP Synthesis – 2

This set of Biochemistry online test focuses on “ATP Synthesis – 2”.

1. The proposal of the chemiosmotic hypothesis was by ____________
a) Peter D. Mitchell
b) Charles Darwin
c) Mendele
d) Alfred Russell
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2. ATP synthesis by chemiosmosis is by ____________
a) ATP dehydrogenase
b) Gyrase
c) ATP synthase
d) Dehydrogenase
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3. The measure of potential energy stored as a combination of proton and voltage gradients across membrane is termed as ____________
a) Proton motive force
b) Electron motive force
c) Molecule motive force
d) Ion motive force
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4. The transport of acyl co-A for oxidation using a shuttle involves the formation of the intermediate ____________
a) Acyl coenzyme A
b) 3 acetyl co-A
c) Acyl cartinine
d) None
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5. Three identical β subunits of the F1 complex during ATP synthesis have ____________
a) Different affinities for ATP and ADP
b) Similar affinities for ADP and ATP
c) Different affinities for ADP but not ATP
d) Different affinities for ATP but not ADP
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6. The acyl co-A formed in the cytosol is transported to ____________
a) Mitochondrial matrix
b) Microsomes
c) ER
d) Remains in cytosol
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7. Every cycle of β-oxidation produces ____________
a) 1 FAD, 1 NAD⁺ and 2 CO₂ molecules
b) 1 FADH₂, 1 NADH and 1 acetyl co-A
c) 1 FADH₂, 1 NAD⁺ and 1 acetyl co-A
d) 1 FAD, 1 NADH and 2 CO₂ molecules
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8. Membrane potential and the proton gradient ____________
a) Cancel one another when uncouplers are present
b) Reinforce one another when respiratory inhibitors are present
c) Are sufficient, separately to make ATP from ADP + Pi
d) Are required to make ATP
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9. Long-chain fatty acids are oxidized step-wise in one carbon unit starting from ____________
a) Carboxyl end
b) Aliphatic end
c) Carboxyl and Aliphatic end
d) None of the mentioned
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10. Maximum energy per gram on oxidation is yielded from ____________
a) Starch
b) Fat
c) Glycogen
d) Protein
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