Deoxyribose is a pentose sugar with five carbon atoms. The four carbon atoms of the ring are numbered 1', 2', 3' and 4' The carbon atom of - $CH _{2} OH $ is numbered 5'There are three $—OH$ groups at position 1' , 3' and 5' Hydrogen atoms are attached to carbon atoms 1', 2', 3', 4' and 5' Only carbon atom at $C _{2}$ of deoxyribose sugar in DNA does not contain $—C —OH$ bond.
Note The prefix 2' - deoxy means that oxygen is missing from the 2' position of ribose.
