Question

What is the primary function of rRNA? : *

(A) rRNA encodes the messages for genes which are then translated by ribosomes in the cytoplasm. (B) rRNA anticodons are paired with codons by ribosomes to assemble nascent peptides during translation. (C) rRNA is the nucleic acid component of ribosomes and binds RNA messages during translation. (D) rRNA encodes a gene in the nucleus of a cell prior to transcription by host polymerases.

Answer 1

Correct option is (c).rRNA is the nucleic acid component of ribosomes and it is essential for protein synthesis in all living organisms. It binds to mRNA and tRNA, to ensure that the codon sequence of the mRNA is accurately translated into a protein during translation.rRNA in the larger subunit of he ribosome catalyses the reaction that forms a peptide bond between the amino acid in the A-site and the growing polypeptide chain in the P-site. The polypeptide synthesis is terminated when the ribosome reaches a stop codon and rRNA catalyses the addition of a water molecule to the polypeptide in the P-site.Other options are not correct according to given explanation.

Option b is incorrect because tRNA anticodons are paired with codons by ribosomes to assemble nascent peptides during translation. Option a is incorrect because mRNA encodes the message for genes. Option d is incorrect because rRNA does not encodes a gene in the nucleus of a cell prior to transcription by host polymerases.