Cytokinins


 
 
Concept Explanation
 

Cytokinins

Cytokinins are chemicals which promote cytokinesis (cell division). They are produced in dividing cells throughout the plant. In mature plants, cytokinins are produced in the root tips and are transported to the shoots.

Functions

  • It helps in breaking dormancy and regulating phloem transport.
  • As it causes cell division therefore it is also involved in synthesis of RNA and DNA.
  • It also causes cell enlargement.
  • It delays senescence in plants.
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    Sample Questions
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    Question : 1

    Auxin and _____________ hormone promote shoot and root growth in tissue culture. 

    Right Option : B
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    Explanation
    Question : 2

    Which of the following is responsible for inhibition of rooting in plants ?

    Right Option : B
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    Explanation
    Question : 3

    Hormone responsible for reversing the effect of Abscisic acid is ______________

    Right Option : C
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    Explanation
     
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