Question

Identify the wrong statements from the following:
I. DNA polymerase has capability of catalysing the process of elongation of polypeptide chain
II. In splicing, introns are removed and exons are joined
III. In capping, methyl guanosine triphosphate is added to the 5\textsuperscript{' end of hnRNA
IV. In tailing, adenylate residues are added at 5\textsuperscript{' } end }

• A. I & II
• B. II & III
• C. I & IV
• D. II & IV

Hint:

DNA polymerase functions in DNA replication only, not protein synthesis. Capping is 5' methyl guanosine addition; tailing is 3' poly-A addition. Always visualize the processes along RNA strands to avoid confusion.

Answer 1

The Correct Option is C

DNA polymerase synthesizes DNA, not polypeptides, so statement I is wrong. Tailing occurs at the 3' end, not 5', so statement IV is wrong. Splicing and capping statements (II and III) are correct. Therefore, option 3 is correct.