Multiple choice

The polynucleotide chain is cloverleaf-shaped in ________.

  1. Ribosomal RNA (rRNA)

  2. Transfer RNA (tRNA)

  3. Messenger RNA (mRNA)

  4. DNA
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B Correct answer
Explanation

It represents about 10 to 15% of the total RNA in the cell. It has the shortest molecule having only about 80 to 100 nucleotides. The polynucleotide chain is folded on itself to have the shape of a cloverleaf. The molecule has three lateral loops, a DHU loop, a t loop and an anticodon loop. The anticodon loop bears a triplet combination of nitrogen bases, called anticodon. It is complementary to a codon of mRNA.

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