Question

Cytokinins are mostly ____________.

• A. glucosides
• B. phenolics
• C. amino purines
• D. organic acids.

Answer 1

Answer: (C)

amino purines

Cytokinins are plant growth hormones which are basic in nature, either amino purine or phenyl urea derivatives, that promote cytokinesis (= cell division) either alone or in conjunction with auxin. Kinetin, a synthetic cytokinin, is 6-furfuryl amino purine. Zeatin, a natural cytokinin, is 6-hydroxy 3-methyl trans 2-butenyl amino purine.