back to directory
NEET BIOLOGYPlant Growth and Development Easy

Question

The gaseous plant growth regulator is used in plants to:

A

kill dicotyledonous weeds in the fields

B

speed up the malting process

C

promote root growth and root hair formation to increase the absorption surface

D

help overcome apical dominance

Step-by-Step Solution

The gaseous plant growth regulator mentioned in the text is Ethylene . Ethylene promotes root growth and root hair formation, which helps to increase the absorption surface .

Functions of other regulators mentioned in the options:

  • Auxins (e.g., 2, 4-D) are used to kill dicotyledonous weeds .
  • Gibberellins (GA3GA_3) are used to speed up the malting process in the brewing industry .
  • Cytokinins help overcome apical dominance .

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 gaseousgrowthregulatorplants

More Plant Growth and Development Questions

View all

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
EasySolve

Which one of the following growth regulators is known as the stress hormone?

A.Abscisic acid
B.Ethylene
C.GA3
D.Indole acetic acid
EasySolve

Which of the following growth regulators is an adenine derivative?

A.Auxin
B.Cytokinin
C.Ethylene
D.Abscisic acid
EasySolve

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
EasySolve

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
EasySolve

Which hormone is responsible for fruit ripening?

A.Ethylene
B.Auxin
C.Ethyl chloride
D.Cytokinin
EasySolve

Coconut milk factor is:

A.An auxin
B.A gibberellin
C.Abscisic acid
D.Cytokinin
EasySolve

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)
EasySolve

Why 32,000+ students choose TopperSquare

Everything you need to crack NEET

15,000+ Chapter MCQs

Physics, Chemistry, Biology — chapter-wise, topic-wise practice

AI Performance Analytics

Know your weak topics. Get a personalised study plan.

Full NEET Mock Tests

180 questions, timed, with detailed score analysis

PYQ Sets 2010–2024

15 years of past papers with solved explanations

Start Practising Free

No credit card · 30-second signup · Free forever plan included

This neet biology practice question is part of the TopperSquare free question bank. TopperSquare offers 15,000+ chapter-wise NEET MCQs across Physics, Chemistry, and Biology with detailed step-by-step explanations, full mock tests, NEET PYQs (2010–2024), and an AI-powered performance analytics dashboard. browse all neet practice questions → · practice biology sets →

Explore more subjects:Physics MCQs•Chemistry MCQs•Biology MCQs•Botany MCQs•Zoology MCQs•NEET Mock Tests•NEET PYQs