Biomolecules — BIOLOGY STD 11 Science — Question

1. Glucose unit.

Explanation:

Glycogen is the storage polysaccharide present in animals. Glycogen consist of glucose molecule linked together with $\alpha(1\rightarrow4)$ linkages with $\alpha(1\rightarrow6)$ branch points occurring every 8-12 residues. Galactose, on the other hand is a monosaccharide, and combines with glucose through condensation reaction, resulting in the formation of disaccharide, lactose. Ribose is a pentose monosaccharide which has all hydroxyl groups on the same side in fisher projection. It forms a part of backbone in RNA and DNA. Amino acids are the monomers of proteins.