Question

Assertion: In eukaryotes, replication and transcription occur in the nucleus but translation takes place in the cytoplasm.

Reason: mRNA is transferred from the nucleus into cytoplasm where ribosomes and amino acids are available for protein synthesis.

• A. Both assertion and reason are true and reason is the correct explanation of assertion
• B. Both assertion and reason are true but reason is not the correct explanation of assertion
• C. Assertion is true but reason is false
• D. Both assertion and reason are false

Answer 1

The correct option is A Both assertion and reason are true and reason is the correct explanation of assertion

Replication is the process by which cells make an extra copy of DNA. Transcription is the process by which the genetic information from one of the strands of DNA is copied on to a mRNA. In eukaryotes, DNA replication and transcription take place in the nucleus.
The mRNA formed by in the nucleus is then transported out into the cytoplasm through the nuclear pore after being processed (it undergoes splicing, capping and tailing within the nucleus).

Translation refers to the process of polymerisation of amino acids to form a polypeptide. Since the ribosomes and amino acids required for translation are present in the cytoplasm, the process occurs in the cytoplasm.