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NEET BIOLOGYPlant Growth and Development Easy

Question

Match the following concerning the activity/function and the phytohormone involved:

Column-I (Activity/Function) Column-II (Phytohormone) (a) Fruit ripening (i) Abscisic acid (b) Herbicide (ii) Ethylene (c) Bolting (iii) Auxin (d) Stress hormone (iv) Gibberellic acid

A

(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

B

(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)

C

(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

D

(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)

Step-by-Step Solution

:

  • Ethylene is a gaseous hormone mainly involved in fruit ripening .
  • Auxins like 2,4-D are widely used as herbicides to kill dicotyledonous weeds .
  • Gibberellins cause bolting (internode elongation just prior to flowering) in beet, cabbages, and many plants with rosette habit .
  • Abscisic acid (ABA) stimulates the closure of stomata and increases tolerance to various stresses, hence it is called the stress hormone .

Exam Context & Concepts Covered

This question aligns with the NEET BIOLOGY syllabus, specifically targeting concepts from Plant Growth and Development . Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

BIOLOGYPlant Growth and Development followingconcerningactivityfunctionphytohormoneinvolved

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Spraying of which of the following phytohormone on juvenile conifers helps in hastening the maturity period, that leads to early seed production?

A.Abscisic Acid
B.Indole-3-butyric Acid
C.Gibberellic Acid
D.Zeatin
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Which one of the following growth regulators is known as the stress hormone?

A.Abscisic acid
B.Ethylene
C.GA3
D.Indole acetic acid
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Which of the following growth regulators is an adenine derivative?

A.Auxin
B.Cytokinin
C.Ethylene
D.Abscisic acid
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The phenomenon by which the undividing parenchyma cells start to divide mitotically during plant tissue culture is called as :

A.Differentiation
B.Dedifferentiation
C.Redifferentiation
D.Secondary growth
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Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.

A.Gibberellin
B.Ethylene
C.Abscisic acid
D.Cytokinin
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Which hormone is responsible for fruit ripening?

A.Ethylene
B.Auxin
C.Ethyl chloride
D.Cytokinin
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Coconut milk factor is:

A.An auxin
B.A gibberellin
C.Abscisic acid
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Removal of shoot tips is a very useful technique to boost the production of tea leaves. This is because:

A.Gibberellins prevent bolting and are inactivated.
B.Auxins prevent leaf drop at early stages.
C.Effect of auxins is removed and the growth of lateral buds is enhanced.
D.Gibberellins delay the senescence of leaves.
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