Question

The most abundant RNA of cell is:

• A. mRNA
• B. tRNA
• C. rRNA
• D. None of the above

Answer 1

The correct option is C

rRNA

The correct option is option C.

Explanation of the correct option:

1. The most abundant type of RNA is known as rRNA.
2. Ribosomal ribonucleic acid (rRNA) is an RNA component of ribosomes, & is essential for protein synthesis in all living organisms.
3. It also constitutes the predominant material within ribosomes, which is approximately 60% rRNA and 40% protein by its weight.
4. The ribosomal RNAs are from 2 subunits, a large subunit (LSU) and a small subunit (SSU).
5. mRNA is sandwiched b/w small and large subunits, and ribosome catalyzes the formation of a peptide bond between two amino acids that are contained in rRNA.

Explanation of the incorrect options:

Option A:

1. mRNA stands for messenger RNA.
2. This RNA provides a template for gene coding at the time of protein synthesis.
3. mRNA in the translation process carries codons.

Option B:

1. tRNA stands for transfer RNA.
2. tRNA is responsible for carrying the amino acids to the ribosomes.
3. They carry anticodons, specific to a certain amino acid.

Final answer: The most abundant RNA of cell is rRNA.