Which of the following is a plant hormone?

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RRB NTPC - 2019

General Science

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)

Estrogen

Chlorophyll

Thyroxin

Auxin

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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