- 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 (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 statements |
Subtopic: Â Ethylene |
 83%
Level 1: 80%+
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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: Â Ethylene |
Level 3: 35%-60%
Hints
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: Â Growth Hormones & Auxin |Â Gibberellin |Â Ethylene |Â Abscisic Acid |
 93%
Level 1: 80%+
Hints
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: Â Auxin Function |Â Gibberellin |Â Cytokinin |Â Ethylene |Â Abscisic Acid |
 94%
Level 1: 80%+
Hints
Match List I with List II:
Choose the correct answer from the options given below:
| 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: Â Growth Hormones & Auxin |Â Gibberellin |Â Ethylene |Â Abscisic Acid |
 77%
Level 2: 60%+
Hints
Match List I with List II
Choose the correct answer from the option given below:
| 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: Â Auxin Function |Â Gibberellin |Â Ethylene |
 89%
Level 1: 80%+
Hints
| 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: Â Ethylene |Â Abscisic Acid |
 74%
Level 2: 60%+
Hints
Match List-I with List-II
Choose the correct answer from the options given below:
| 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: Â Auxin Function |Â Gibberellin |Â Cytokinin |Â Ethylene |
 87%
Level 1: 80%+
NEET - 2023
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- 1(current)
Q. No.
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