Biochemistry Questions and Answers – Mitochondrial Genes: Their Origin and the Effects of Mutations

This set of Biochemistry Questions and Answers for Campus interviews focuses on “Mitochondrial Genes: Their Origin and the Effects of Mutations”.

1. How many human mitochondrial proteins are encoded in the mitochondrial genome and synthesized within mitochondria?
a) 11
b) 12
c) 13
d) 14
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2. How many mitochondrial proteins are encoded in nuclear genes and imported into mitochondria after their synthesis?
a) 600
b) 700
c) 800
d) 900
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3. What is Mitochondrial DNA?
a) Simple, single stranded linear DNA molecule
b) Simple, single stranded circular DNA molecule
c) Simple, double stranded linear DNA molecule
d) Simple, double stranded circular DNA molecule
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4. Oxysomes or F₀ – F₁ particles occur on _____________
a) Inner mitochondrial membrane
b) Chloroplast surface
c) Mitochondrial surface
d) Thylakoids
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5. More than what proportion of mitochondrial proteins are coded by nuclear DNA?
a) 95%
b) 50%
c) 10%
d) 40%
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6. What is the size of human mitochondrial DNA?
a) 16kb
b) 200kb
c) 2500kb
d) 100kb
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7. What is the size of plant mitochondrial DNA?
a) 16kb
b) 200-2500kb
c) 100- 2550kb
d) 100-2500kb
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8. Typically how many copies of DNA is/are there in each mitochondrion?
a) 1
b) 11
c) 10
d) 12
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9. Mitochondrial DNA is one of the best marker tools for population biologists and evolutionary biologists because _____________
a) Absence of genetic recombination in mt-DNA
b) Mitochondrial genes are specific to mt-DNA
c) It can be easily isolated
d) It undergoes spontaneous mutation
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10. The mechanism of action of cyanide, a mitochondrial toxin, is by inhibiting ____________
a) ATP synthase
b) Succinate dehydrogenase
c) Cytochrome c oxidase
d) NADH dehydrogenase
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Sanfoundry Global Education & Learning Series – Biochemistry.

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