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Biotechnology: Principles and Processes — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYBiotechnology: Principles and Processes1 Mark
Question
Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.
  1. Both assertion and reason are true and reason is the correct explanation of assertion.
  2. Both assertion and reason are true but reason is not the correct explanation of assertion.
  3. Assertion is true but reason is false.
  4. Both assertion and reason are false.
Assertion: YAC vectors have been exploited extensively in the mapping of large genomes.
Reason: YAC vectors have a composite structure made of bacteriophage and plasmid.
✓

Answer

  1. Both assertion and reason are true and reason is the correct explanation of assertion.

Explanation:

Yeast Artificial Chromosome (YACs) is a human engineered DNA molecule derived from the yeast. YACs are often used in connection with mapping and sequencing of genomes. Segments of an organism's DNA, upto one million base pairs in length, can be inserted into YACs. The YACs are then taken up by yeast cells. As the yeast cell grow and divide, they amplify the YAC DNA, which can be isolated and used for DNA mapping and sequencing.

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