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Biotechnology

5 Class 12 Biology questions with answers and explanations.

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All questions with answers
  1. Enzymes that cut DNA at specific sites are:

    • 1 Proteases
    • 2 Ligases
    • 3 Restriction enzymes
    • 4 Polymerases
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    Correct answer: Restriction enzymes

    Restriction endonucleases cut at specific sequences.

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  2. PCR is used to:

    • 1 Stain cells
    • 2 Copy DNA
    • 3 Grow plants
    • 4 Cut proteins
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    Correct answer: Copy DNA

    The polymerase chain reaction amplifies DNA.

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  3. Plasmids are used as:

    • 1 Enzymes
    • 2 Fuels
    • 3 Hormones
    • 4 Vectors
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    Correct answer: Vectors

    They carry genes into bacterial cells.

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  4. Dolly the sheep was produced by:

    • 1 Fermentation
    • 2 Cloning
    • 3 Natural mating
    • 4 Selective breeding
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    Correct answer: Cloning

    She was cloned from an adult cell.

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  5. DNA fingerprinting is used in:

    • 1 Taking X rays
    • 2 Forensic identification
    • 3 Measuring blood pressure
    • 4 Digesting food
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    Correct answer: Forensic identification

    Individuals have unique DNA banding patterns.

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