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Cytokinin are mostly...

Cytokinin are mostly

A

glucosides

B

phenolics

C

amino purines

D

organic acids

Text Solution

Verified by Experts

The correct Answer is:
C
Cytokinin are plant growth hormones which are basic in nature, cytokinin (=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.
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Assertion : Cytokinins lead to retention of chlorophyll and delay the senescence in leaves. Reason: cytokinins are only responsible for root primordia formation.

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NCERT FINGERTIPS-PLANT GROWTH AND DEVELOPMENT-Plant Growth And Development
  1. Intrinsic heterophylly is found in all except

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  2. Development in plants is influenced by both intrinsic and extrinsic fa...

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  3. Cytokinin are mostly

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  4. Select the pair that consists of plant growth promoters only.

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  5. Which of the following is both a growth promoter as well as a growth ...

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  6. Functions of plant growth promoters and plant growth inhibitros are gi...

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  7. Hormone involved in phototropism is

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  8. Which plant hormone induces the phenomenon of photoropism in plants?

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  9. Avena curvature test is a bioassay for examining the activity of

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  10. Gibberellin was first extracted from

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  11. Which one is paired incorrectly?

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  12. Who isolated auxins from tips of coleoptiles of oat seedings?

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  13. High concentration of auxin is present in

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  14. Which of the following effects of auxins on plants is the basis for th...

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  15. Which of the following hormones is used in root formation on stem cutt...

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  16. Select the correct statements (s) regarding auxins.

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  17. Apical dominance is dicot plants is due to the presence of morein the ...

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  18. The term 'auxin precursor' refers to

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  19. Read the given statements and select the correct option. (i) Darwin ...

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  20. In the process of apical dominance, lateral buds are unable to grow in...

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