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Plant Hormones MCQs for Competitive Exams

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Plant Hormones MCQs for Competitive Exams

Practice with answers, explanations, and exam-focused revision notes.

38 MCQs Page 1

Topic Notes: Plant Hormones

These notes summarize the key preparation context before you attempt the MCQs. Review the topic focus, then practice the questions below with answers and explanations.

Quick Overview

Plant Hormones MCQs in Agriculture are useful for candidates who need targeted practice for CSS, PMS, FPSC, PPSC, NTS, entry tests, and other competitive exams in Pakistan. This topic page is designed for quick revision, repeated practice, and exam-focused preparation.

Attempt the questions page by page, check the correct answers, read the explanations where available, and compare your weak areas with past papers and mock test performance. Consistent MCQ practice improves speed, confidence, and retention for objective exam sections.

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1
Which compound serves as the primary precursor for the biosynthesis of abscisic acid (ABA) in plants?
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2
Which amino acid serves as the primary precursor for the biosynthesis of the plant hormone auxin?
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3
What is the biological classification of auxin?
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4
Which plant hormone is synthesized in certain species as a physiological response to exposure to low temperatures?
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5
To which class of terpenoids does Abscisic Acid (ABA) belong?
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6
Which physiological changes occur in plants when subjected to drought stress?
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7
What is the primary physiological role of zinc in plant development?
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8
Which plant growth regulator can serve as a substitute for low-temperature chilling requirements?
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9
How are auxins and cytokinins classified in plant science?
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10
What is the full chemical name for the widely used herbicide and growth regulator known as 2,4-D?
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