Plant Growth And Development — DPP 2

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
Arithmetic growth is related to :-
  1. A $\mathrm{Lt}_{\mathrm{t}}=\mathrm{Loe}^{r \mathrm{t}}$
  2. B $\mathrm{W}_{1}=\mathrm{W}_{0} \mathrm{e}^{\mathrm{rt}}$
  3. C $\mathrm{L}_{\mathrm{t}}=\mathrm{L}_{0}+\mathrm{rt}$
  4. D Lo $=\mathrm{Lte}^{\mathrm{rt}}$
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Correct answer: C

2
6. Primary precursor of I.A.A is :-
  1. A Phenyl alanine
  2. B Tyrosine
  3. C Tryptophan
  4. D Leucin
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Correct answer: C

3
Which of the following plant growth regulators is responsible for 'respiratory climactic'?
  1. A Auxin
  2. B Ethylene
  3. C ABA
  4. D Cytokinin
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Correct answer: B

4
Assertion: Development is a term that includes all changes that an organism goes through during its life cycle.
Reason: Plants follows different pathways in response to environment or phases of life to form different kinds of structures.
  1. A Both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
  2. B Both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
  3. C Assertion is True but the Reason is False.
  4. D Both Assertion & Reason are False.
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Correct answer: B

5
Through their effect on plant growth regulators, what do the temperature and light control in the plants?
  1. A Closure of stomata
  2. B Fruit elongation
  3. C Apical dominance
  4. D Flowering
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Correct answer: D

6
2, 4-D is a :-
  1. A Synthetic auxin
  2. B Natural auxin
  3. C Synthetic cytokinin
  4. D Natural cytokinin
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Correct answer: A

7
Among the following which helps in ripening of fruits?
  1. A Methane
  2. B Ethylene
  3. C $\mathrm{CO}_{2}$
  4. D CO
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Correct answer: B

8
Phototropic curvature is the result of uneven distribution of:
  1. A Gibberellin
  2. B Phytochrome
  3. C Cytokinins
  4. D Auxin
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Correct answer: D

9
Hormone involved in induction of $\alpha$-amylase in Barley endosperm :-
  1. A GA
  2. B NAA
  3. C Ethylene
  4. D ABA
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Correct answer: A

10
Growth is measured by a variety of parameters, among following which is not included in these?
  1. A Fresh weight
  2. B Dry weight
  3. C Surface area
  4. D Cell type
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Correct answer: D

11
Which one of the following acids is a derivative of carotenoids?
  1. A Indole-3-acetic acid
  2. B Gibberellic acid
  3. C Abscisic acid
  4. D Indole butyric acid
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Correct answer: C

12
Which of the following plant growth regulators is synthesised in large amounts by tissues undergoing senescence and ripening fruits ?
  1. A Gibberellin
  2. B Zeatin
  3. C IBA
  4. D Ethylene
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Correct answer: D

13
Regarding factors affecting the development, PGR is the :-
  1. A Extrinsic control
  2. B Intrinsic intra cellular control
  3. C Neither intrinsic nor extrinsic control
  4. D Intrinsic inter cellular control
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Correct answer: D

14
Trees showing seasonal activities, represent what kind of growth curve ?
  1. A Sigmoid
  2. B Linear
  3. C J-shaped
  4. D Hyperbola
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Correct answer: A

15
Cells/tissues arising out of the same meristem have different structures at maturity, this phenomenon in plants is called:
  1. A Open growth
  2. B Open differentiation
  3. C Indeterminate growth
  4. D Determinate differentiation
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Correct answer: B

16
Which growth hormone is responsible for apical dominance?
  1. A Auxin
  2. B Cytokinin
  3. C Gibberellin
  4. D Ethylene
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Correct answer: A

17
Quantitative comparisons between the growth of living systems can be made by :
  1. A Absolute growth rate
  2. B Relative growth rate
  3. C Exponential growth rate
  4. D Both (1) and (2)
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Correct answer: D

18
Which of the following is a characteristic feature of meristematic cells?
  1. A Cells are rich in protoplasm
  2. B Cell walls are primary in nature
  3. C Presence of large conspicuous nuclei
  4. D All of the above
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Correct answer: D

19
An enzyme that can stimulate germination of barley seeds is
  1. A Protease
  2. B Invertase
  3. C $\alpha$-amylase
  4. D Lipase
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Correct answer: C

20
Which plant hormone promotes the growth of lateral buds ?
  1. A Auxin
  2. B Cytokinin
  3. C Gibberellin
  4. D Abscisic acid
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Correct answer: B

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