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  • 1(current)
Q. No.
Assertion (A) : Ethylene helps the plants to increase their absorption surface.
Reason (R) : It promotes root growth and root hair formation. 
 
1. Both (A) and reason are true and (R) is the correct explanation of (A)
2. Both (A) assertion and (R) are true but (R)is not the correct explanation of (A)
3. (A) is true but (R) is false 
4. Both (A) and (R) are false statements

Subtopic:  Ethylene |
 83%
From NCERT
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Assertion (A): Ethephon hastens fruit ripening in tomatoes.
Reason (R): Ethephon releases ethylene readily.

Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.

Subtopic:  Ethylene |
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Match the following concerning the activity/function and the phytohormone involved:-

(a) Fruit ripener (i) Abscisic acid
(b) Herbicide (ii) GA 3
(c) Bolting agent (iii) 2, 4-D
(d) Stress hormone (iv) Ethephon

Select the correct option from following:-

(a) (b) (c) (d)
1. (ii) (iii) (iv) (i)
2. (iii) (iv) (ii) (i)
3. (iv) (iii) (ii) (i)
4. (iv) (ii) (i) (iii)
Subtopic:  Growth Hormones & Auxin | Gibberellin | Ethylene | Abscisic Acid |
 93%
From NCERT
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Match the Following:

Column I

Column II

A. IAA

B. ABA

C. Ethylene

D. GA

E. Cytokinin

1. Herring sperm DNA.

2. Bolting

3. Stomatal closure

4. Weed-free lawns

5. Ripening of fruits.

Codes
 

Options:  A   B   C   D   E 
1. 4 3 5 2 1
2. 5 3 4 2 1
3. 4 1 4 3 2
4. 5 3 2 4 4 

 

Subtopic:  Auxin Function | Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
 93%
From NCERT
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Match List I with List II:
List I List II
A. Abscisic acid I. Induce parthenocarpy
B. Gibberellin II. Delay senescence
C. Auxin III. Regulates dormancy
D. Ethylene IV. Promotes root growth

Choose the correct answer from the options given below:
1. A - (III); B - (II); C - (I); D - (IV)
2. A - (II); B - (I); C - (IV); D - (III)
3. A - (III); B - (II); C - (IV); D - (I)
4. A - (I); B - (II); C - (III); D - (IV)

 
Subtopic:  Growth Hormones & Auxin | Gibberellin | Ethylene | Abscisic Acid |
 76%
From NCERT
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Match List I with List II
List I List II
A. Indole Acetic Acid I. Increase length of grapes stalks
B. Zeatin II. Hastens fruit ripening in tomatoes
C. Gibberellic acid III. Overcome apical dominance
D. Ethephon IV. Rooting in stem cuttings

Choose the correct answer from the option given below:
1. A-II, B-I, C-IV, D-III
2. A-IV, B-II, C-I, D-III
3. A-IV, B-III, C-I, D-II
4. A-III, B-IV, C-II, D-I




 
Subtopic:  Auxin Function | Gibberellin | Ethylene |
 89%
From NCERT
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Assertion(A): ABA is one of the most widely used PGRs in agriculture.
Reason(R): Ethylene regulates many physiological processes.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.

 
Subtopic:  Ethylene | Abscisic Acid |
 74%
From NCERT
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Match List-I with List-II
List-I List-II
(A) Auxin (I) Promotes female flower formation in cucumber
(B) Gibberellin (II) Overcoming apical dominance
(C) Cytokinin (III) Increase in the length of grape stalks
(D) Ethylene (IV) Promotes flowering in pineapple

Choose the correct answer from the options given below:
Options: (A) (B) (C) (D)
1. II I IV III
2. IV III II I
3. I III IV II
4. III II I IV
Subtopic:  Auxin Function | Gibberellin | Cytokinin | Ethylene |
 86%
From NCERT
NEET - 2023
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