Question
Which of the following is a plant hormone?
This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
Auxin
Plant Hormone Identification: Auxin
The question asks to identify the plant hormone among the given options. Plant hormones, also known as phytohormones, are chemicals produced within plants that regulate growth and development.
Analyzing the Options
- Estrogen: This is a primary female sex hormone in animals, not found in plants.
- Chlorophyll: This is a green pigment crucial for photosynthesis in plants, but it is not a hormone.
- Thyroxin: This is a hormone produced by the thyroid gland in animals, regulating metabolism. It is not a plant hormone.
- Auxin: This is a class of plant hormones that play a vital role in plant growth, including cell elongation, root formation, and phototropism.
Conclusion
Based on the analysis, Auxin is the only substance listed that functions as a plant hormone.
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