MCQ Collection
MDCAT Biology MCQs
Practice MDCAT Biology questions with answers and explanations.
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Correct Answer: B. Transfusion of infected blood
Explanation:
HIV can spread through infected blood, sexual contact and from mother to child.
Ordinary social contact and mosquitoes do not transmit it.
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Correct Answer: C. Transfusion of infected blood
Explanation:
HIV can spread through infected blood, sexual contact and from mother to child.
Ordinary social contact and mosquitoes do not transmit it.
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Correct Answer: D. Transfusion of infected blood
Explanation:
HIV can spread through infected blood, sexual contact and from mother to child.
Ordinary social contact and mosquitoes do not transmit it.
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Correct Answer: A. Separation of charged molecules by movement through a gel in an electric field
Explanation:
DNA fragments are separated mainly by size.
Smaller fragments usually move farther through the gel.
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Correct Answer: B. Structures with similar function but different evolutionary origin
Explanation:
Analogous structures often arise through convergent evolution.
Bird and insect wings are examples.
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Correct Answer: B. Nucleic acid genome
Explanation:
A virus carries either DNA or RNA as its genome.
The capsid protects this genetic material.
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Correct Answer: C. Use of biological systems or organisms to develop useful products and processes
Explanation:
Biotechnology includes fermentation, genetic engineering, diagnostics, and tissue culture.
It combines biology with technology.
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Correct Answer: C. Nucleic acid genome
Explanation:
A virus carries either DNA or RNA as its genome.
The capsid protects this genetic material.
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Correct Answer: D. Use of biological systems or organisms to develop useful products and processes
Explanation:
Biotechnology includes fermentation, genetic engineering, diagnostics, and tissue culture.
It combines biology with technology.
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Correct Answer: D. Nucleic acid genome
Explanation:
A virus carries either DNA or RNA as its genome.
The capsid protects this genetic material.
Choose an option to check your answer.
Correct Answer: A. Use of biological systems or organisms to develop useful products and processes
Explanation:
Biotechnology includes fermentation, genetic engineering, diagnostics, and tissue culture.
It combines biology with technology.
Choose an option to check your answer.
Correct Answer: B. DNA formed by joining sequences from different sources
Explanation:
Restriction enzymes and ligase can assemble recombinant molecules.
The DNA may then be introduced into a host cell.
