Plant Growth And Development — DPP 1

20 NEET questions from Plant Growth And Development, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

Attempt this test free 20 questions · 30 minutes · +80 marks
1
Abscisic acid treatment results in -
  1. A Leaf expansion
  2. B Stem elongation
  3. C Stomatal closure
  4. D Root elongation
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Correct answer: C

2
Stem elongation is affected by :-
  1. A Gibberellin and florigen
  2. B Auxin and gibberellin
  3. C Florigen and kinin
  4. D Kinin and auxin
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Correct answer: B

3
The maximum growth rate occurs in :-
  1. A Exponential phase
  2. B Stationary phase
  3. C Senescent phase
  4. D Lag phase
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Correct answer: A

4
Cell elongation in internodal regions of the green plants takes place due to :-
  1. A Ethylene
  2. B Indole acetic acid
  3. C Cytokinin
  4. D Gibberellins
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Correct answer: D

5
Decapitation i.e. removal of shoot tips in a plant usually results in :-
  1. A Inactivation of lateral buds
  2. B Growth of lateral buds
  3. C Cessation of plant growth
  4. D Yellowing of leaves
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Correct answer: B

6
Richmond - Lang effect is due to :-
  1. A Cytokinin
  2. B Auxin
  3. C ABA
  4. D Ethylene
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Correct answer: A

7
Cytokinin -
  1. A Is a hormone whose main function is to induce the cell division
  2. B Induce bolting
  3. C Induce senescence
  4. D Causes dormancy
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Correct answer: A

8
The biological activity of I.A.A is tested by :-
  1. A $\alpha$-amylase test
  2. B Avena curvature test
  3. C Endosperm activity test
  4. D Chlorophyll preservation test
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Correct answer: B

9
Which one of the following is a gaseous plant hormone?
  1. A Auxin
  2. B Gibberellin
  3. C Ethylene
  4. D Cytokinin
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Correct answer: C

10
Dormancy of seed is broken by :-
  1. A Auxin
  2. B Gibberellins
  3. C Ethylene
  4. D Cytokinin
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Correct answer: B

11
Which is a stress hormone ?
  1. A Benzyl aminopurine (BAP)
  2. B Dichlorophenoxy acetic acid
  3. C Ethylene
  4. D Abscisic acid
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Correct answer: D

12
Indole, 3 acetic acid, called as auxin was first isolated from :-
  1. A Human urine
  2. B Corn germ oil
  3. C Fusarium
  4. D Rhizopus
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Correct answer: A

13
When a plant faces scarcity of water, which of the following hormone synthesized in mesophyll tissue-
  1. A Auxin
  2. B Gibberellin
  3. C Cytokinin
  4. D Abscisic acid
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Correct answer: D

14
Natural cell division inducing factor occurs in-
  1. A Coconut milk
  2. B Immature maize seeds
  3. C Both (1) and (2)
  4. D Heated t - RNA
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Correct answer: C

15
In a growing plant, the first phase during the process of growth is -
  1. A Cell division
  2. B Cell enlargement
  3. C Cell differentiation
  4. D Cell maturation
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Correct answer: A

16
Gibberellins can promote seed germination because of their influence on :
  1. A Rate of cell division
  2. B Production of hydrolysing enzymes
  3. C Synthesis of abscisic acid
  4. D Absorption of water through hard seed coat.
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Correct answer: B

17
In germinating seeds Amylase, Proteases, Lipases are stimulated by :-
  1. A Auxin
  2. B Gibberellin
  3. C Cytokinin
  4. D Ethylene
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Correct answer: B

18
Which of the following plant hormone substitutes for long photoperiod in flowering plant?
  1. A Auxin
  2. B Gibberellin
  3. C Cytokinin
  4. D Ethylene
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Correct answer: B

19
Apical dominance can be overcome by application of :-
  1. A Auxin
  2. B Gibberellin
  3. C Cytokinin
  4. D Florigen
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Correct answer: C

20
Seed dormancy is due to the :-
  1. A Ethylene
  2. B Abscisic acid
  3. C IAA
  4. D Starch
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Correct answer: B

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