NEET Biology Chapter Wise Mock Test – Plant Growth and Development
1. Growth of an organism is characterised by
(a) an irreversible permanent increase in size of an organ
(b) an irreversible permanent increase in size of a cell
(c) Both (a) and (b)
(d) reversible permanent changes
2. Plant growth is unique because
(a) plant retains the capacity for unlimited growth
(b) plant retains the capacity for limited growth
(c) plants have diffused growth that differes from animals
(d) None of the above
3. Plant growth is measured by
(a) auxanometer
(b) porometer
(c) potometer
(d) respirometer
4. Growth can be measured in various ways, which of these can be used as parameters to measure growth
(a) increase in cell number
(b) increase in cell size
(c) increase in length and weight
(d) All of the above
5. The term synergistic action of hormones refers to
(a) When two hormones act together but bring about opposite effects
(b) When two hormones act together and contribute to the same function
(c) When one hormone affects more than one function
(d) When many hormones bring about any one function
6. The phenomenon of growth is immediately followed by
(a) senescence
(b) differentiation
(c) development
(d) maturation
7. Growth is maximum in the zone of
(a) cell division
(b) cell elongation
(c) cell maturation
(d) All of these
8. The usual shape of growth curve is
(a) linear
(b) inverted bell-shaped
(c) sigmoidal
(d) zig-zag
9. Maximum growth occurs during
(a) stationary phase
(b) lag phase
(c) exponential phase
(d) senescent phase
10. The ‘grand phase’ corresponds to
(a) lag phase
(b) log phase
(c) linear phase
(d) senescence phase
11. Plasticity in plant growht means that
(a) plant roots are extensible
(b) plant development is dependent on the environment
(c) stems can extend
(d) None of the above
12. Arrange the above below steps of geometrical growth (from beginning to last) in a correct sequence of their occurrence. Choose the correct option. ‘
I. Lag phase
II. Stationary phase
III. Exponential phase
(a) I ->II -> III
(b) I ->lll ->ll
(c) lll–>ll->l
(d) III ->l ->ll
13. In geometrical growth, log phase is represented by
(a) rapid consumption of nutrient
(b) rapid increment of cell number .
(c) highest growth rate
(d) All of the above
14. Which one is an example of redifferentiation?
(a) Cork cambium
(b) Secondary cortex
(c) Meristems
(d) Interfascicular cambium
15. Match the following columns.
Codes
ABC ABC
(a) 1 3 2 (b) 3 2 1
(c) 1 2 3 (d) 3 1 2
16. Which is the example of dedifferentiation?
(a) Procambium and vascular cambium
(b) Cork cambium and interfascicular cambium
(c) Cork cambium and vascular cambium
(d) Procambium and cork cambium
17. Environment heterophylly is seen in
(a) cotton
(b) coriander
(c) larkspur
(d) buttercup
18. Diagram A and B indicate the shape of leaves in larkspur and buttercup respectively, choose the correct option.
(a) The juvenile and adult leaf of larkspur differ in size due to genetic and plant growth regulator factors
(b) Both leaf of buttercup differ in size due to genetic and
intercellular factors
(c) Both larkspur and buttercup leaf size variation is due to habitat plasticity
(d) None of the above
19. Avena curvature test is a bioassay for examining the activity of
(a) auxins
(b) gibberellins
(c) cytokinins
(d) ethylene
20. Which of the following acids is a derivative of carotenoids?
(a) Indole butyric acid
(b) lndole-3-acetic acid
(c) Gibberellic acid
(d) Abscisic acid
21. One of the synthetic auxin is
(a)NAA
(b)IAA
(c) GA
(d) I BA
22. Auxin synthesis occurs in
(a) root/shoot tips
(b) cortex
(c) xylem
(d) phloem cells
23. Sprouting of potato under storage condition can be prevented by
(a) auxin
(b) gibberellin
(c) ethylene
(d) cytokinin
24. The auxin 2, 4, 5-T is
(a) phenoxy acid
(b) benzoic acid
(c) indole auxin
(d) naphthalenic acid
25.Mobilisation of stored food in germinating seed is triggered by
(a) ABA
(b) GA
(c) cytokinin
(d) ethylene
26.Gibberellins can promote seed germination because of their influence on
(a) rate of cell division
(b) production of hydrolysing enzymes
(c) synthesis of abscisic acid
(d) absorption of water through hard seed coat
27.Dwarfness can be controlled by treating plants with
(a) cytokinin
(b) gibberellic acid
(c) auxin
(d) anti-gibberellin .
28.The affect of apical dominance can be overcome by which of the following hormone?
(a) IAA
(b) Ethylene
(c) Gibberellin
(d) Cytokinin
29.Which of the following hormone is concerned mainly with root initiation?
(a) I BA
(b) ABA
(c)GA3
(d) CK
30.To increase sugar production in sugarcanes, they are sprayed with
(a) IAA
(b) cytokinin
(c) gibberellin
(d) ethylene
31.GA4 and GA5 were isolated from
(a) Gibberella
(b) Gibberella and bean seeds respectively
(c) bean seeds and Gibberella respectively
(d) bean seeds,
32.Coconut milk factor is
(a) auxin
(b) gibberellic acid
(c) abscisic acid …
(d) cytokinin
33.Coconut milk contains
(a) ABA
(c) cytokinin
(b) auxin
(d) gibberellin
34.Etiolation of plants is caused when they
(a) are grown in dark
(b) have mineral deficiency
(c) are-grown in intense light
(d) are grown in blue light
35.Induction of cell division and delay in senescence is done by
(a) cytokinin
(b) kinetin
(c) gibberellin
(d) auxin
36.Stimulation of cell division is concerned with
(a) cytokinin
(b) gibberellin
(c) auxin
(d) florigen
37.Richmond-Lang effect is shown by
(a) auxin
(b) gibberellins
(c) kinetin
(d) sugars
38. The synthesis of cytokinins is thought to occur mainly in the
(a) shoot tips
(b) root tips
(c) leaf tips
(d) young fruits
39. The senescence of detached leaves can be delayed by the application of
(a) IAA
(b)NAA
(c) 2,4-D
(d) CK
40. Hormone inducing fruit ripening is
(a) ethylene
(b) cytokinin
(c) gibberellic acid
(d) abscisic acid
41. Fruit drop is caused by
(a) more auxin in fruit than in stem
(b) less auxin in fruit than in stem
(c) equal distribution of auxin in stem and fruit
(d) the absence of auxin in stem and fruit
42. For ethylene production in plants, oxygen is
(a) essential
(b) not essential
(c) required in the initial stages
(d) required in later stages ’
43. Major precursor of ethylene production in plants is
(a) lysine
(b) methionine
(c) alanine
(d) valine
44. Function of ABA is
(a) apical dominance
(b) monocyte
(c) cell division
(d) seed germination
45. Leaf abscission is caused by
(a) ABA
(b) cytokinin
(c) auxin
(d) gibberellin
46. Primary and secondary growth are inhibited by
(a) auxin
(b) gibberellin
(c) abscisic acid
(d) cytokinins
47. Hormone responsible for ageing is
(a) GA
(b) IAA
(c) ABA
(d) cytokinin
48. Match the following columns.
Codes
ABC D E
(a) 1 2 3 4 5
(b) 5 4 3 2 1
(c) 5 4 1 2 3
(d) 4 5 1 2 3
49. ABA acts as antagonistic to
(a) ethylene
(b) cytokinin
(c) gibberellic acid
(d) IAA
50. Which of the given is a long-day plant?
(a) Glycine max
(b)Spinach
(c) Chrysanthemum
(d)Tomoto
51. Phytochrome is found in
(a) algae
(b)Fungi
(c) flowering plants
(d) all vasucular plants
52. Which pigment involves in photoperiodic change in plants?
(a) Phytochrome
(b)Cytochrome
(c) Chlorophyll
(d)Anthocyanin
53. Short-day plant is
(a) Xanthium
(b)Pisum
(c) Cucumis
(d)Avena
54. Flowering in long-day plants is favoured by
(a) ethylene
(b) gibberellin
(c) cytokinin
(d) auxin
55. Most of the plants are seasonal due to the
(a) photoperiodism
(b) phototropism
(c) photosynthesis
(d) photolysis
56. A plant detects the direction of light by means of
(a) pigments
(b) stomatal size
(c) amyloplasts
(d) heat receptors
57. The photoperiod in plants is perceived at
(a) meristem
(b) flower
(c) floral buds
(d) leaves
58. Photoperiod was first observed in
(a) potato
(b) Maryland mammoth
(c) four O’ clock
(d) evening primrose
59.Match the following columns .
60. Hormone responsible for vernalisation is
(a) florigen
(b) caulocaline
(c) abscissin
(d) vernaline
61. Temperature required for vernalisation is
(a) 5°C to 10°C
(b) 5°C to 15°C
(c) 0°C to 5°C
(d) 3°C to 17°C
62. Examples of plants which requires vernalisation is/are
(a) pea
(b) beet
(c) cabbage
(d) All of these
63. Winter varieties of wheat and barley are planted in
(a) spring season
(b) winter season
(c) autumn season
(d) summer season
64. The preception of stimulus of cold treatment vernalisation is received by
(a) leaves
(b) shoot apex
(c) axiflary buds
(d) ethylene
65. Match the following columns.
Codes
A B C D
(a) 1 2 3 4
(b) 4 1 2 3
(c) 4 2 3 1
(d) 1 4 3 2
66. Identify A, B and C in the given graph and choose the correct option accordingly.
Codes
A B C D
(a) 3 5 1 2
(b) 1 . 3 2 4
(c) 5 4 2 1
(d) 3 2 1 5
67.Match the following columns.
Codes
A B C D
(a) 3 5 1 2
(b) 1 3 2 4
(c) 5 4 2 1
(d) 3 2 1 5
Direction (Q.Nos. 68-76) In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
(c) If Assertion is true, but Reason is false.
(d) If both Assertion and Reason are false.
68. Assertion Differentiation is a process in which plant undergoes maturation.
Reason During differentiation, cells loose their protoplasm.
69. Assertion Abscisic Acid (ABA) is-also known as stress hormone.
Reason It is produced in much higher amounts, when plants are subjected to stress.
70. Assertion Short-day plants generally require light period of less than 12 h and continuous dark period of about 14-16 h.
Reason Spinach is a short-day plant.
71. Assertion Vernalisation is an aerobic process.
Reason In the absence of oxygen, the cold treatment becomes completely ineffective.
72. Assertion Auxins have controlling influence on the abscission of leaves, fruits, etc.
Reason Auxins also break dormancy.
73. Assertion Flowers also synthesise ethylene just before they fade and wither.
Reason Abscisic acid helps in flowering.
74. Assertion The shoot apical meristems are the only source of auxin synthesis.
Reason Dormancy of lateral buds is due to the higher accumulation of auxins.
75. Assertion Vernalisation is artificial treatment given to plant.
Reason Vernalisation is perceived by meristematic cells of whole plants.
76. Assertion Sigmoid curve of growth consist of four parts.
Reason Log phase is also called grand phase of growth.
77. What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows?
(a) Green plants need light to perform photosynthesis
(b) Green plants seek light because they are phototropic
(c) Light stimulates plant cells on the lighted side to grow faster
(d) Auxin accumulates on the shaded side, stimulating greater cell elongation there
78. Typical growth curve in plants is
(a) sigmoid
(b) linear
(c) stair-steps shaped
(d) parabolic
79. Dr. F Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly cut coleoptile stumps. Of what significance is this experiment?
(a) It made possible the isolation and exact identification of auxin
(b) It is the basis for quantitative determination of small amounts of growth-promoting substances
(c) It supports the hypothesis that IAA is auxin
(d) It demonstrated polar movement of auxins
80. Which one of the following growth regulators is known as ‘stress hormone’?
(a) Abscisic acid
(b) Ethylene
(c) GA3
(d) Indole acetic acid
81. During seed germination its stored food is mobilised by
(a) ethylene
(b) cytokinin
(c) ABA
(d) gibberellin
82. Through their effect on plant growth regulators, what do the temperature and light control in the plants?
(a) Apical dominance
(b) Flowering
(c) Closure of stomata
(d) Fruit elongation
83. Which one of the following generally acts as an antagonist to gibberellins?
(a) Zeatin
(b) Ethylene
(c) ABA
(d) IAA
84. Vernalisation stimulates flowering in
(a) zimikand
(b) turmeric
(c) carrot
(d) ginger
85.is the result of uneven
(a) gibberellin
(b) phytochrome
(c) cytokinins
(d) auxin
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