Question

Choose the type of nucleic acid that is correctly matched with its form or function.
$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{P. DNA}& \text{i. Pyridoxine}\\ \text{Q. rRNA}& \text{ii. Clover-leaf-model}\\ \text{R. tRNA}& \text{iii. Double helical model}\\ & \text{iv. Peptidyl transferase}\end{array}$

Answer 1

DNA is the abbreviation for deoxyribonucleic acid. It has a double helical structure where two strands that are antiparallel in nature are held together by hydrogens bonds. One strand runs from 5’ to 3’ while the other strand runs from 3’ to 5’.

rRNA (ribosomal RNA) is a constituent of ribosomes. 23S rRNA in bacteria shows catalytic activity (peptidyl transferase) due to which it is known as the ‘ribozyme’. It is involved in catalysing the formation of peptide bonds between adjacent amino acids during protein synthesis.

tRNA (transfer RNA) helps in protein synthesis by transporting amino acids from the cytoplasm to the ribosome where the formation of polypeptide takes place.

Pyridoxine is a form of vitamin B6.