BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Answer: Auxin promotes cell growth and elongation of the plant. In the elongation process, auxin alters the plant wall plasticity making it easier for the plant to grow upwards. Auxin also influences rooting formations.

Detailed explanation-2: -Auxins also play a role in cell division and differentiation, in fruit development, in the formation of roots from cuttings, in the inhibition of lateral branching (apical dominance), and in leaf fall (abscission).

Detailed explanation-3: -Auxins are a group of naturally occurring and artificially synthesized plant hormones. They play an important role in the regulation of plant growth. Auxins were initially isolated from human urine.

Detailed explanation-4: -Functions: Cell elongation of stems and roots. Apical dominance, IAA in apical bud suppresses the growth of lateral buds. Induces parthenocarpy i.e. development of fruit without fertilisation e.g. in tomatoes.

Detailed explanation-5: -Auxin is a plant hormone responsible for growth nd development. Helps in cell elongation of stems and roots. Promotes flowering, e.g. in pineapple.