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STD 11 - 13. Plant growth and development — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 13. Plant growth and development1 Mark
MCQ
A hormone delaying senescence is
  • A
    Auxin
  • ✓
    Cytokinin
  • C
    Ethylene
  • D
    Gibberellin
✓

Answer

Correct option: B.
Cytokinin
b
Senescence is the process of ageing which is caused by increased entropy, cellular breakdown, reduced anabolic process and increased catabolic process. Cytokinins are amino purine derivatives which promote cell division and delay senescence by controlling protein synthesis.

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