Q165 / 180 · AIIMS 2005 · Zoology

Assertion : Replication and transcription occur in the nucleus but translation occurs in the cytoplasm. Reason : $m \mathrm{RNA}$ is transferred from the nucleus into the cytoplasm where ribosomes and amino acids are available for protein synthesis.

  • Correct answer
    A
    If both assertion and reason are true and reason is the correct explanation of assertion
  • B
    If both assertion and reason are true but reason is not the correct explanation of assertion
  • C
    If assertion is true but reason is false
  • D
    If both assertion and reason are false.

Solution

DNA replication is the process of forming carbon copy of DNA. Whereas transcription is the formation of RNA over DNA template. DNA replication and transcription takes place in nucleus as the required material DNA and RNA are present in the nucleus. Translation is the process of protein synthesis. It is separated from transcription in both space and time. It prevents the intermixing of raw materials, protect DNA from respiratory enzymes and ribosomal machinery from nuclease.

Hence, the correct answer is option: 'A'.

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