Intine of the pollen grain is made up of:

The correct answer is Option (3) → Cellulose and pectin

The wall of a pollen grain has two layers. The hard outer layer, the exine, is made of sporopollenin and has germ pores. The inner wall is the intine. It is a thin and continuous layer made up of cellulose and pectin, the same kind of materials as the walls of ordinary plant cells.

(1) Starch and agarose — Incorrect. Starch is the stored food of plants, and agarose is a seaweed polymer used to make gels. Neither forms the pollen wall.

(2) Heparin and lignin — Incorrect. Heparin is a substance made in animals that stops blood clotting. Lignin makes the walls of wood cells hard. Neither forms the intine.

(3) Cellulose and pectin — Correct. These make the soft inner wall of the pollen grain.

(4) Glycogen and collagen — Incorrect. Both are animal substances. Glycogen is the stored carbohydrate of animals, and collagen is a structural protein of connective tissue.

Note: A similar question was also asked in CUET (UG) 2026 on 26-05-2026 (Slot 1) and on 19-05-2026 (Slot 1).

NCERT Extract:
Stamen, Microsporangium and Pollen Grain – …