Type of RNA which does not exist is
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → s-RNA
RNA molecules in the cell are of three types, and each has its own job in protein synthesis:
m-RNA (messenger RNA) copies the genetic message from DNA and carries it to the ribosome.
r-RNA (ribosomal RNA) is a part of the ribosomes, where the protein chain is built.
t-RNA (transfer RNA) brings the right amino acid to the ribosome and places it according to the message on m-RNA.
Option (1) m-RNA — A type of RNA named in the book.
Option (2) s-RNA — Not one of the three types named in the book. The name s-RNA (soluble RNA) is an older name for t-RNA.
Option (3) r-RNA — A type of RNA named in the book.
Option (4) t-RNA — A type of RNA named in the book.
NCERT (2026-27 edition):
Structure of Nucleic Acids – …
