NEET BIOLOGY

Detailed explanation-1: -Zeatin is a cytokinin derived from adenine, which occurs in the form of a cis-and a trans-isomer and conjugates. Zeatin was discovered in immature corn kernels from the genus Zea. It promotes growth of lateral buds and when sprayed on meristems stimulates cell division to produce bushier plants.

Detailed explanation-2: -Summary. cis-Zeatin is often characterized as low-active cytokinin, but its widespread distribution, complex metabolism and specific regulation, suggests many possible functions.

Detailed explanation-3: -There are two types of cytokinins: adenine-type cytokinins represented by kinetin, zeatin, and 6-benzylaminopurine, and phenylurea-type cytokinins like diphenylurea and thidiazuron (TDZ). Most adenine-type cytokinins are synthesized in roots. Cambium and other actively dividing tissues also synthesize cytokinins.

Detailed explanation-4: -Zeatin is a plant growth hormone in the cytokinin family. It consists of a purine ring structure with a side chain that contains hydroxyl, amino, and olefin groups. It was discovered in the corn genus Zea, for which it is named.

Detailed explanation-5: -So, the correct answer is ‘Kinetin, zeatin, BAP’