BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Cytokinin is a plant growth hormone that is present in in plant roots and shoots. It promotes cell division, cell growth & differentiation and faciltates the growth of a plant while working along with auxin.

Detailed explanation-2: -Gibberellins. Gibberellins stimulate cell division and elongation, break seed dormancy, and speed germination.

Detailed explanation-3: -Primarily, aging and the dropping of leaves are controlled by the plant growth hormone named abscisic acid (ABA). It also helps to control the dormancy of the seeds and to sustain the plant in adverse conditions.

Detailed explanation-4: -Ethylene is regarded as a multifunctional phytohormone that regulates both growth, and senescence. It promotes or inhibits growth and senescence processes depending on its concentration, timing of application, and the plant species.

Detailed explanation-5: -Cytokinins are plant hormones which promotes cytokinesis or cell division. It also helps in opening of stomata, delaying ageing in leaves, etc.