AIIMS 2019 Botany Nucleosides and Nucleotides MCQ Question

A nucleoside consists of a nitrogenous base (either purine or pyrimidine) attached to a sugar molecule, specifically ribose in RNA or deoxyribose in DNA, without any phosphate groups. Option C correctly identifies the components of a nucleoside as C (sugar) and D (nitrogenous base). Other options are incorrect as they either include phosphate groups or do not accurately represent the essential components of a nucleoside. Understanding the structure of nucleosides is crucial for grasping the building blocks of nucleic acids, which play vital roles in genetic information storage and transfer.