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Molecular Basis Of Inheritance

Question
CBSEENBI12002888

hnRNA undergoes two additional processes. Out of them in one process an unusual nucleotide (methyl GPT) is added to the 5' end of the molecule. What would you call this?

  • Tailing

  • Splicing

  • Termination

  • Capping

Solution

D.

Capping

The process of addition of methyl GPT at the 5' end of hnRNA is known as capping. Enzyme guanly transferase catalyses this process.

Cap is essential for the formation of mRNA- Ribosome complex. Translation is not possible if cap is lacking, because cap is identified by 18 SrRNA of ribosome unity.