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STD 12 - 5. molecular basis of inheritance — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 5. molecular basis of inheritance1 Mark
MCQ
In some viruses, $RNA$ is present instead of $DNA$ indicating that
  • A
    their nucleic acid must combine with host $DNA$ before replication.
  • B
    they cannot replicate.
  • C
    there is no hereditary information.
  • ✓
    $RNA$ can act to transfer heredity.
✓

Answer

Correct option: D.
$RNA$ can act to transfer heredity.
d
$RNA$ and $DNA$ both are genetic material and carry genetic information from one generation to other. A virus is a small parasite that cannot reproduce by itself. Most viruses have either $RNA$ or $DNA$ as their genetic material. Once a virus infects a susceptible cell, it can direct the cell machinery to produce more viruses.

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