Question

Which one of these has the shape of a clover-leaf in two-dimensional structure?

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

Answer 1

The correct option is C tRNA

A. Ribosomal RNA or rRNA is the basic constituent of ribosomes and formed from the nucleolar organising region of chromosomes in eukaryotes. It plays structural and catalytic role during translation of mRNA into proteins.

B. Messenger RNA or mRNA is single stranded without any base pairing. Structural components of mRNA include a CAP at 5' end, non coding region 1, initiation codon AUG, coding region, termination codon, non coding region 2 and poly-A sequence at 3' end. mRNA is translated into proteins by ribosomes.

C. Transfer RNA or tRNA accounts for only 0.025% of the total DNA content. The primary structure of tRNA is considered as a clover leaf model. The function of tRNA is to align the required amino acid according to the nucleotides sequence of mRNA.

So, the correct answer is 'tRNA'.