Q.

Choose correct option related to discovery of cytokinins.

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a

Cytokinins were discovered as kinetin from autoclaved herring sperm DNA

b

Extract of vascular tissues, yeast extract coconut milk contain auxin

c

Kinetin occurs naturally in plants

d

Kinetin was identified, crystallized and named by E. Kurosawa 

answer is D.

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Detailed Solution

Cytokinins have specific effects on cytokinesis, and were discovered as kinetin (a modified form of adenine, a purine) from the autoclaved herring sperm DNA.

Extract of vascular tissues, yeast extract coconut milk contain cytokinin.

Miller et al. (1955), identified and crystallised the cytokinesis promoting active substance that they termed kinetin.

Kinetin does not occur naturally in plants.

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