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Botany MCQs for NEET — Practice Questions with Answers

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Zeatin

A. Isolated from herring sperm B. Isolated from coconut milk and corn Kernels C. Isolated from corn Kernels D. Isolated from rice seedlings

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Explanation

Page number-249

15.4 Plant Growth Regulators

15.4.3 Physiological Effects of Plant Growth Regulators

15.4.3.3 Cytokinins

Plant Growth And Development

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Natural Cytokinins are not found in

A. Root apices B. Developing shoot buds C. Young Fruits D. Root hair zone

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Explanation

Page number-249

15.4 Plant Growth Regulators

15.4.3 Physiological Effects of Plant Growth Regulators

15.4.3.3 Cytokinins

Plant Growth And Development

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Cytokinins

Helps to produce new leaves

Helps to produce chloroplasts in leaves

Lateral shoot growth, Adventitious Shoot Formation

All of these

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Explanation

Page number-250

15.4.3.3 Cytokinins

Plant Growth and Development

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Cytokinin

Which of the following is not correct?

A. Help to overcome apical dominance B. They promote nutrient mobilisation and helps in the delay of leaf senescence C. Lateral Shoot Growth D. Formation of Tap root

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Explanation

Page number-250

15.4.3.3 Cytokinins

Plant Growth and Development

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Which of the following hormones is synthesised in large amounts by tissues undergoing senescence and ripening fruits?

A. Ethylene B. ABA C. Auxins D. GA3

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Explanation

Page number-250

15.4.3.4 Ethylene

Plant Growth and Development

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Influences of Ethylene in plants do not include

A. Horizontal growth of seedlings B. Swelling of the axis C. Apical hook formation in dicot seedlings D. Lateral shoot growth

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Explanation

Page number-250

15.4.3.4 Ethylene

Plant Growth and Development

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Ethylene does not perform

A. Promotes senescence and abscission of plant organs especially of leaves and flowers B. Highly effective in fruit ripening C. Enhances the respiration rate during ripening of the fruits D. Overcome the apical dominance

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Explanation

Page number-250

15.4.3.4 Ethylene

Plant Growth and Development

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The rise in respiration rate of fruit is called

A. Respiratory quotient B. Respiratory climactic C. Respiratory incision D. Respiratory succulence

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Explanation

Page number-250

15.4.3.4 Ethylene

Plant Growth and Development

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Respiratory climactic is due to

A. Ethylene B. ABA C. GA D. Auxins

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Explanation

Page number-250

15.4.3.4 Ethylene

Plant Growth and Development

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The function which is not performed by Ethylene is

A. Breaking of seed and bud dormancy B. Initiates germination in peanut seeds C. Improving the internode length of sugarcane D. Promotes rapid internode and petiole elongation in deep water rice plants

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Explanation

Page number-250

15.4.3.4 Ethylene

Plant Growth and Development

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