Q160 / 180 · JIPMER 2017 · Zoology

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

  • A
    Tailing
  • B
    Splicing
  • C
    Termination
  • Correct answer
    D
    Capping

Solution

The process of addition of methyl GPT at the $5^{\prime}$ 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.

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

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