Biotechnology Questions and Answers

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Q21
The vaccine against hepatitis B is produced by:
  • A a) Chemical synthesis
  • B b) Recombinant DNA technology
  • C c) Live virus attenuation
  • D d) Hybridoma technique
Answer: Option B
Explanation: The hepatitis B vaccine is produced using recombinant DNA technology in yeast.
Q22
The genetic material in retroviruses is:
  • A a) DNA
  • B b) RNA
  • C c) Protein
  • D d) Nucleoside
Answer: Option B
Explanation: Retroviruses have RNA as their genetic material.
Q23
Monoclonal antibodies are produced using:
  • A a) Hybridoma technology
  • B b) Cloning
  • C c) Gene splicing
  • D d) Electrophoresis
Answer: Option A
Explanation: Hybridoma technology involves fusing B-cells with myeloma cells to produce monoclonal antibodies.
Q24
Which technique separates DNA fragments based on size?
  • A a) Chromatography
  • B b) Centrifugation
  • C c) Gel electrophoresis
  • D d) Spectroscopy
Answer: Option C
Explanation: Gel electrophoresis separates DNA fragments by size as they migrate through a gel under an electric field.
Q25
The purpose of biofertilizers is to:
  • A a) Increase soil salinity
  • B b) Improve soil fertility
  • C c) Kill pests
  • D d) Reduce photosynthesis
Answer: Option B
Explanation: Biofertilizers contain microorganisms that enhance soil fertility by fixing nitrogen or solubilizing phosphorus.

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