Question:
Which of the following is primarily concerned with cell division?
Which of the following is primarily concerned with cell division?
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The prefix "cyto-" refers to cells, and "kinin" refers to movement/division.
Hence, Cytokinins are always associated with active cell division and delaying senescence (Richmond-Lang effect).
Hence, Cytokinins are always associated with active cell division and delaying senescence (Richmond-Lang effect).
Updated On: Aug 18, 2026
- \(GA_3\)
- IAA
- Cytokinin
- Ethylene
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Different classes of phytohormones regulate specific developmental stages of plants, such as elongation, division, differentiation, and senescence.
Step 2: Detailed Explanation:
Cytokinins are a class of plant growth substances active in promoting cell division (cytokinesis) in plant roots and shoots.
The first cytokinin, kinetin, was discovered as a product that promotes cell division in tobacco pith cultures.
Auxins (like IAA) are primarily responsible for cell elongation and apical dominance, while Gibberellins (like \(GA_3\)) promote stem elongation and seed germination.
Step 3: Final Answer:
The hormone primarily concerned with cell division is Cytokinin, which is option (C).
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