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NEETZoologyMolecular Basis of Inheritance

Match List-I with List-II. List-I List-II A. Capping I. Template independent addition of adenylate residues at 3' end B. Tailing II. Removal of introns and joining of exons C. Splicing III. Addition of methyl guanosine triphosphate at 5' end D. hnRNA IV. Precursor of mRNA in eukaryotes Choose the correct answer from the options given below:

Options

  1. AA-I, B-III, C-II, D-IV
  2. BA-III, B-II, C-IV, D-I
  3. CA-III, B-I, C-II, D-IV
  4. DA-I, B-II, C-III, D-IV

Correct answer

C. A-III, B-I, C-II, D-IV

Step-by-step solution

In eukaryotes, the primary transcript is called heterogeneous nuclear RNA (hnRNA), which acts as the precursor of mRNA. It undergoes essential post-transcriptional modifications in the nucleus: - Capping involves the addition of an unusual nucleotide (methyl guanosine triphosphate) specifically at the 5' end of hnRNA. - Tailing involves the addition of adenylate residues (200-300) at the 3' end in a template-independent manner. - Splicing is the process where non-coding sequences (introns) are removed and coding se

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