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Q. No.Match each item in Column I with the one given in Column II and select the correct match from the codes given:
COLUMN I
COLUMN II
A
Auxins
P
Terpenes
B
Gibberellins
Q
Derivatives of carotenoids
C
Cytokinins
R
Adenine derivative
D
Abscisic acid
S
Indole compounds
Codes:
A
B
C
D
1.
S
P
R
Q
2.
P
Q
S
R
3.
Q
R
P
S
4.
R
S
Q
P
Subtopic: Growth Hormones & Auxin |
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Match the PGR in Column I with their chemical nature in Column II and select the correct match from the codes given:
Codes:
| COLUMN I | COLUMN II | ||
| A | Auxin | P | F. W. Went |
| B | Gibberellin | Q | E. Kurosawa |
| C | Cytokinin | R | F. Skoog and co-workers |
| D | Ethylene | S | H. H. Cousins |
Codes:
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | Q | R | S | P |
| 3. | R | S | P | Q |
| 4. | S | P | Q | R |
Subtopic: Growth Hormones & Auxin |
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From NCERT
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Which of the following is not a function of ethylene?
| 1. | Breaking seed and bud dormancy |
| 2. | Horizontal growth of seedlings, swelling of axis and apical hook formation in dicot seedlings |
| 3. | Enhancement of respiration rate during ripening of fruits |
| 4. | Closure of stomata during water stress |
Subtopic: Ethylene | Abscisic Acid |
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Cell elongation in internodal regions of the green plants takes place due to:
| 1. | Cytokinins | 2. | Gibberellins |
| 3. | Ethylene | 4. | Indole acetic acid |
82%
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | Shoot apices modify themselves into flowering apices prior to lowering. |
| Reason (R): | Shoot apices are the sites of perception of light/dark in plants. |
In the light of the above statements choose the correct answer from the options given below:
| 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: Photoperiodism (OLD NCERT) |
63%
From NCERT
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | Spraying sugarcane crops with gibberellins increase the yield by as much as 20 tonnes per acre. |
| Reason (R): | Sugarcane stores carbohydrates such as sugar in their stems. |
| 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: Gibberellin |
From NCERT
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | Growth, at a cellular level, is measured by a variety of parameters such as increase in fresh weight, dry weight, length, area, volume and cell number. |
| Reason (R): | Such parameters are more or less proportional to the increase in protoplasm which is primarily responsible for growth at cellular level. |
| 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: Growth |
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From NCERT
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Match each item in Column I with the one in Column II and select the correct match from the codes given:
Codes:
| COLUMN I [PGR] |
COLUMN II [Discovered by] |
||
| A | Auxin | P | F. W. Went |
| B | Gibberellic acid | Q | E. Kurosawa |
| C | Kinetin | R | Miller et al. |
| D | Ethylene | S | H. H, Cousins |
Codes:
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | Q | P | S | R |
| 3. | R | S | Q | P |
| 4. | S | R | P | Q |
Subtopic: Growth Hormones & Auxin |
90%
From NCERT
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Match each item in Column I with one in Column II and select the correct match from the codes given:
| COLUMN I | COLUMN II | ||
| A | Auxins | P | Indole compounds |
| B. | Cytokinins | Q | Skoog and Miller |
| C. | Gibberellins | R | Terpenes |
| D. | Ethylene | S | Cousins |
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | P | R | S | Q |
| 3. | R | P | Q | S |
| 4. | R | S | P | Q |
Subtopic: Growth Hormones & Auxin |
88%
From NCERT
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The ratio of cytokinins to auxin controls cell differentiation in a callus, if:
I. Auxin levels increase shoot buds develop from the callus
II. Cytokinins level increase, roots form
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Development | Growth Hormones & Auxin | Cytokinin |
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