Which of the following RNAs is not required for the synthesis of protein?

Correct answer: 1)

Concept:

• The synthesis of protein is known as translation.
• It takes place in the cytoplasm of the cell.
• The machinery for translation includes- transfer RNA (tRNA), messenger RNA (RNA), ribosomal RNA (rRNA), and different enzymatic factors.

Explanation:

• Option 1: Small interfering RNA (siRNA) are double-stranded RNA molecules that inhibit the translation of specific mRNA.
• They do not participate in protein synthesis.
• Option 2: DNA is transcribed into mRNA that serves as a template for protein synthesis.
• It is single-stranded and contains a sequence of nucleotides that codes for amino acids.
• A triplet of nucleotide forms a codon and each codon codes for a single amino acid.
• Option 3:
• Transfer RNA (tRNA) brings amino acids to the ribosomes during protein synthesis.
• Specific tRNA is there for specific amino acids.
• Option 4: Ribosomes are made up of rRNA which is essential for protein synthesis.

So, the correct answer is option 1.