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Botany MCQs for NEET — Practice Questions with Answers

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Auxein means

A. To escape B. To slow C. To grow D. To fasten

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Explanation

Page number-248

15.4 Plant Growth Regulators

15.4.3 Physiological Effects of Plant Growth Regulators

15.4.3.1 Auxins

Plant Growth And Development

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Auxins was first isolated from

A. Human serum B. Human urine C. Human stool D. Human saliva

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Explanation

Page number-248

15.4 Plant Growth Regulators

15.4.3 Physiological Effects of Plant Growth Regulators

15.4.3.1 Auxins

Plant Growth And Development

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Which of the following is not isolated from plants?

A. NAA B. IAA C. IBA D. GA3

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Explanation

Page number-248

15.4 Plant Growth Regulators

15.4.3 Physiological Effects of Plant Growth Regulators

15.4.3.1 Auxins

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For all natural and synthetic compounds involved in growth, which of the following term is used

A. Auxein B. Auxin C. GA3 D. GAs

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Explanation

Page number-248

15.4 Plant Growth Regulators

15.4.3 Physiological Effects of Plant Growth Regulators

15.4.3.1 Auxins

Plant Growth And Development

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Auxins

Find the odd one.

A. Initiate rooting in stem cuttings B. Promote flowering e.g. Pineapples C. Prevent fruit and leaf drop at early stages D. Prevent the abscission of older mature leaves and fruits

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Explanation

Page number-248

15.4 Plant Growth Regulators

15.4.3 Physiological Effects of Plant Growth Regulators

15.4.3.1 Auxins

Plant Growth And Development

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In most higher plants, the growing apical bud inhibits the growth of …….. or axillary buds, a phenomenon called………….

A. Lateral, lateral Dominance B. Lateral, Apical Dominance C. Apical, Lateral Dominance D. Apical, Apical Dominance

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Explanation

Page number-248

15.4 Plant Growth Regulators

15.4.3 Physiological Effects of Plant Growth Regulators

15.4.3.1 Auxins

Plant Growth And Development

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Parthenocarpy in tomatoes is induced by

A. GA3 B. ABA C. Auxin D. Cytokinins

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Explanation

Page number-249

15.4 Plant Growth Regulators

15.4.3 Physiological Effects of Plant Growth Regulators

15.4.3.1 Auxins

Plant Growth And Development

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2,4-D widely used to

A. Kill dicot trees B. Kill monocot weeds C. Kill dicot weeds D. Kill monocot shrubs

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Explanation

Page number-249

15.4 Plant Growth Regulators

15.4.3 Physiological Effects of Plant Growth Regulators

15.4.3.1 Auxins

Plant Growth And Development

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Which of the following is not a function performed by Auxin?

A. Controls Xylem differentiation B. Helps in cell division and cell growth inhibition C. Used as herbicide D. Used to prepare weed free lawns by gardeners

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Explanation

Page number-249

15.4 Plant Growth Regulators

15.4.3 Physiological Effects of Plant Growth Regulators

15.4.3.1 Auxins

Plant Growth And Development

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Which of the following is not correct about Gibberellins?

A. Another kind of promotors PGR B. There are more than 100 Gibberellins C. Found in Fungi and higher plants D. The first and most intensively studied form of Gibberellins is GA2

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Explanation

Page number-249

15.4 Plant Growth Regulators

15.4.3 Physiological Effects of Plant Growth Regulators

15.4.3.2 Gibberellins

Plant Growth And Development

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