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Which type of RNA transports genetic information from the DNA in the nucleus to the ribosomes in the cytoplasm, where it directs protein synthesis?
Question

Which type of RNA transports genetic information from the DNA in the nucleus to the ribosomes in the cytoplasm, where it directs protein synthesis?

A.

rRNA

B.

snRNA

C.

tRNA

D.

mRNA

Correct option is D

The Correct Answer is: (d) mRNA
Explanation:
mRNA (messenger RNA) is the type of RNA that carries genetic information transcribed from DNA in the nucleus to the ribosomes in the cytoplasm, where it serves as a template for protein synthesis.
This process is part of gene expression, involving two main stages:
  1. Transcription – DNA is transcribed into mRNA in the nucleus.

  2. Translation – mRNA is read by ribosomes in the cytoplasm to assemble amino acids into a specific protein sequence.

Each set of three nucleotides on mRNA (called a codon) corresponds to a specific amino acid or a stop signal during protein synthesis.

Information Booster:
mRNA is synthesized by RNA polymerase II in eukaryotic cells.
Ribosomes bind to mRNA to initiate translation.
• mRNA has a short life span and degrades after translation is complete.
• It is monocistronic in eukaryotes (codes for one protein) and polycistronic in prokaryotes (can code for multiple proteins).
Additional Information:
  • rRNA (Ribosomal RNA) – Forms the core structure of ribosomes and catalyzes protein synthesis.

  • tRNA (Transfer RNA) – Brings amino acids to ribosomes during translation.

  • snRNA (Small nuclear RNA) – Involved in RNA splicing within the nucleus.


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