Q. No.The most widely used compound as source of Ethylene is
| 1. | Ethephon |
| 2. | Etiope |
| 3. | Ethyl Methyl carbon |
| 4. | Epitope |
Subtopic: Ethylene |
98%
Level 1: 80%+
Hints
Ethephon
| 1. | Thinning Cotton, Cherry and Walnut |
| 2. | Promotes female flowers in cucumber |
| 3. | Hastens the fruit ripening in tomatoes and apples |
| 4. | All of these |
Subtopic: Ethylene |
97%
Level 1: 80%+
Hints
Subtopic: Ethylene |
96%
Level 1: 80%+
Hints
Which hormone is responsible for fruit ripening:
| 1. | Ethylene | 2. | Auxin |
| 3. | Ethyl chloride | 4. | Cytokinin |
Subtopic: Ethylene |
95%
Level 1: 80%+
AIPMT - 2000
Hints
Consider the given two statements:
| Assertion (A): | Ethylene is used commercially to ripen fruits. |
| Reason (R): | Ethylene increases the rate of respiration in fruits, leading to faster ripening. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Ethylene |
95%
Level 1: 80%+
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Ethylene enhances the respiration rate during ripening of the fruits. This rise in rate of respiration is called:
| 1. | respiratory climactic. |
| 2. | utilisation coefficient. |
| 3. | respiratory hyperpnea. |
| 4. | oxygen debt. |
Subtopic: Ethylene |
95%
Level 1: 80%+
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Which of the following hormones is synthesised in large amounts by tissues undergoing senescence and ripening fruits?
| 1. | Ethylene | 2. | ABA |
| 3. | Auxins | 4. | GA3 |
Subtopic: Ethylene |
93%
Level 1: 80%+
Hints
Ethylene acts as both a growth promoter and an inhibitor because:
| 1. | It promotes flowering and fruit ripening but induces senescence and abscission as well. |
| 2. | It inhibits all auxin effects in every tissue. |
| 3. | Its role depends only on photoperiod. |
| 4. | It is active only under anaerobic conditions. |
Subtopic: Ethylene |
93%
Level 1: 80%+
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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%
Level 1: 80%+
Hints
Match each item in Column I with one item in Column II and select the best match from the codes given:
Codes:
| Column I | Column II | ||
| A. | Auxin | P. | Promotes cell division |
| B. | Cytokinin | Q. | Promotes cell elongation |
| C. | Abscisic Acid | R. | Induces dormancy |
| D. | Ethylene | S. | Promotes fruit ripening |
| A | B | C | D | |
| 1. | S | R | P | Q |
| 2. | P | Q | S | R |
| 3. | Q | P | R | S |
| 4. | R | S | Q | P |
Subtopic: Growth Hormones & Auxin | Cytokinin | Ethylene | Abscisic Acid |
93%
Level 1: 80%+
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