Question:
Which of the following is NOT a plant hormone?
Which of the following is NOT a plant hormone?
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Don't confuse Cytokinin (Plant Hormone) with Cytokine (Human Immune Signal).
Updated On: May 14, 2026
- Brassinosteroids
- Cytokinin
- Cytokine
- Nitric oxide
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The Correct Option is C
Solution and Explanation
Step 1: Concept
Plant hormones (phytohormones) regulate growth and development in plants.
Step 2: Analysis
Brassinosteroids and Cytokinins are well-known plant growth regulators. Nitric oxide also acts as a signaling molecule in plants.
Step 3: Reasoning
Cytokines are a broad category of small proteins involved in cell signaling within the animal (specifically human) immune system, not plants.
Step 4: Conclusion
Cytokine is the term that does not belong to the category of plant hormones. Final Answer: (C)
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