Q. A nucleoside on hydrolysis gives
A) A heterocyclic base and orthophosphoric acid
B) An aldopentose, a heterocyclic base and orthophosphoric acid
C) An aldopentose and a heterocyclic base
D) An aldopentose and orthophosphoric acid
Explanation
(c)
Nucleic acid (RNA and DNA) are the natural polymer of nucleotides. A nucleotide contains a nitrogenous (hetrocyclic) base, an aldopentose (generally ribose and deoxy-ribose) and a phosphate group. The combination of former two units is also called a nucleoside.
Phosphate + Pentose sugar + Base = Nucleotide
Sugar Base = Nucleoside
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.