NEET Biology MCQs on Human Growth Development

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NEET Biology Growth And Development Multiple Choice Questions

Question 1. Growth is defined as :

  1. increase in size
  2. increase in shape
  3. increase in weight
  4. permanent increase in dry weight accompanied by a permanent increase in weight, size, and volume.

Answer: 4. permanent increase in dry weight accompanied by a permanent increase in weight, size, and volume.

Question 2. The maximum growth rate occurs in:

  1. exponential phase
  2. lag phase
  3. stationary phase
  4. senescence phase.

Answer: 1. exponential phase

Question 3. Mobilization of stored food in germinating seeds is triggered by :

  1. auxins
  2. cytokinins
  3. gibberellins
  4. ethylene.

Answer: 3. gibberellins

Question 4. The highest concentrations of auxin exist:

  1. at the base of various plant organs
  2. in growing tips of plants
  3. in leaves
  4. in xylem and phloem cells only.

Answer: 2. in growing tips of plants

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Question 5. Exogenous application of Gibberellins induces male flower formation on genetically female plants in:

  1. Cucumis
  2. Cucurbita
  3. Ccirica
  4. Coccinia.

Answer: 2. Cucurbita

Human Growth And Development MCQs

Question 6. Presence of which of the following is associated with seed dormancy?

  1. Starch
  2. Ethylene
  3. IAA
  4. Abscisic acid.

Answer: 4. Abscisic acid

Question 7. Growth takes place when:

  1. destructive processes are more than constructive ones
  2. destructive and constructive processes are equal
  3. constructive processes are more than destructive processes
  4. only anabolic processes occur, and no catabolic processes.

Answer: 3. constructive processes are more than destructive processes

Question 8. Growing points possess :

  1. meristematic cells
  2. mature cells
  3. dead cells
  4. slowly enlarging cells.

Answer: 1. meristematic cells

Question 9. In higher plant growth takes place :

  1. in the entire plant body
  2. in aerial parts only
  3. by growing points scattered all over the body
  4. by growing points confined to certain regions of the plant.

Answer: 4. by growing points confined to certain regions of the plant.

Question 10. The correct sequence of development stages in the plant is :

  1. Flowering-fruiting-juvenility-germination
  2. Germination-juvenility-flowering-fruiting
  3. Juvenility-flowering-germination-fruiting
  4. Fruiting-flowering-Juvenility-germination.

Answer: 2. Germination-juvenility-flowering-fruiting

Human Growth And Development MCQs

Question 11. The correct sequence of cellular growth stage is :

  1. Division-differentiation-elongation
  2. Division-elongation-differentiation
  3. Diffcrcntitation-division-elongation
  4. Elongation-differentiation.

Answer: 2. Division-elongation-differentiation

Question 12. Some chemicals have profound effects on plant growth arc called:

  1. catalytic agents
  2. phytohormones
  3. enzymes
  4. simple hormones.

Answer: 2. phytohormones

Question 13. The short-day winter annual “Pansy” belongs to the genus:

  1. Iberis
  2. Viola
  3. Papaver
  4. Malva.

Answer: 2. Viola

Question 14. The rate of growth of a stem of the plant is measured using:

  1. hydrometer
  2. osmometer
  3. auxanometer
  4. photometer.

Answer: 3. auxanometer

MCQs On Human Growth For NEET

Question 15. Light of low intensity :

  1. increases growth
  2. develops weak stem
  3. decreases growth
  4. does not affect growth.

Answer: 2. develops weak stem

Question 16. The favorable temperature for plant growth is :

  1. 10°-15°C
  2. 15°-20°C
  3. 35°-40°C
  4. 20°-30°C.

Answer: 2. 15°-20°C

Question 17. Plant growth is regulated by :

  1. environment
  2. growth hormones
  3. environment and growth hormones
  4. None of the above.

Answer: 3. environment and growth hormones

Question 18. Classical experiments on plant growth were performed by:

  1. Devers and Pall
  2. Boysen-Jensen and Darwin
  3. Lamarck-Boysen and Jensen
  4. None of the above.

Answer:2. Boysen-Jensen and Darwin

MCQs On Human Growth For NEET

Question 19. Phytohormones are :

  1. hormones regulating growth from seed to adulthood
  2. growth regulators synthesized by plants and influencing the physiological process
  3. hormones regulating flowering
  4. hormones regulating secondary growth.

Answer: 2. growth regulators synthesized by plants and influencing physiological process

NEET Questions Plant Growth and Development Question 20. Which type of light is favorable for plant growth?

  1. White
  2. Red
  3. Green
  4. Violet.

Answer: 2. Red

Question 21. Plants can be vernalized by :

  1. heat treatment
  2. hormonal treatment
  3. cold temperature treatment
  4. colchicine treatment.

Answer: 3. cold temperature treatment

Question 22. The combination of auxin and cytokinin which is likely to induce shoot differentiation in tobacco callus is :

  1. only auxin and no cytokinin
  2. only cytokinin and no auxin
  3. higher concentration of auxin and lower concentration of cytokinin
  4. lower concentration of cytokinin and higher concentration of auxin.

Answer: 3. higher concentration of auxin lower concentration of cytokinin

Question 23. The substance which enhances stem growth is :

  1. enzyme
  2. vitamin
  3. auxin
  4. abscisic acid.

Answer: 3. auxin

NEET Previous Year Questions On Growth

Question 24. The following plant growth substances are not growth promoters:

  1. IAA
  2. Gibberellins
  3. Kinetin
  4. Abscisic acid.

Answer: 4. Abscisic acid.

Question 25. The habit of the cabbage plant can be changed drastically by the application of :

  1. IAA
  2. Gibberellins
  3. Kinetin
  4. Abscisic acid.

Answer: 2. Gibberellins

Question 26. The synthesis of amylase in certain cereals is stimulated by :

  1. IAA
  2. Gibberellins
  3. Kinetin
  4. Abscisic acid.

Answer: 2. Gibberellins

Question 27. The curvature in Avena coleoptile is associated with growth substance :

  1. IAA
  2. Gibberellins
  3. Kinetin
  4. Abscisic acid.

Answer: 1. IAA

Question 28. The short-day winter annual ‘Pansy’ belongs to the genus :

  1. Iberis
  2. Viola
  3. Malva
  4. Papaver.

Answer: 2. Viola

Question 29. 2,4-D stands for :

  1. 2,4-Dichlorobutyric acid
  2. 2,4-Dichlorophenoxy acetic acid
  3. 2,4-Dichloronaphthalene acetic acid
  4. 2,4-Dichloroacetic acid.

Answer: 2. 2,4-Dichlorophenoxy acetic acid

NEET Previous Year Questions On Growth

Question 30. Intermodal elongation is promoted by :

  1. gibberellic acid
  2. ethylene
  3. abscisic acid
  4. coumarin.

Answer: 1. gibberellic acid

Question 31. To be very accurate, the long-day plants have :

  1. Short night requirement for flowering
  2. No night requirement for flowering
  3. Long night requirement for flowering
  4. Short-day requirement for flowering.

Answer: 1. Short night requirement for flowering

Question 32. In the R-FR responses of plants it is the :

  1. the first treatment that counts
  2. middle treatment that counts
  3. last treatment that counts
  4. total of all the treatments that count.

Answer: 3. The last treatment that counts

Question 33. Seedless varieties of tomatoes can be produced by :

  1. spraying hormones on plants
  2. spraying radioactive elements
  3. by subjecting seeds to heat treatment
  4. by vegetative propagation of stem.

Answer: 1. spraying hormones on plants

Question 34. Dormancy in potato buds and seeds can be broken by treating them with :

  1. Auxins
  2. Gibberellins
  3. Auxins and cytokinins
  4. Cytokinins and Gibberellins.

Answer: 4. Cytokinins and Gibberellins

Question 35. Auxin hormones were first discovered by :

  1. Skoog
  2. Hales
  3. Boysen and Jensen
  4. Kogl.

Answer: 3. Boysen and Jensen

Human Growth Process MCQs NEET

Question 36. The ethylene hormone is mainly responsible for:

  1. formation of root hair
  2. ripening of fruit
  3. formation of nodes
  4. formation of intemodes.

Answer: 2. ripening of fruit

Question 37. What will happen if Gibberellins are applied to intact plants?

  1. Increase in root
  2. Ripening of fruits
  3. Leaf extension growth
  4. Sudden elongation of the stem.

Answer: 4. Sudden elongation of the stem.

Question 38. One of the important roles of cytokinin is:

  1. to check senescence
  2. to check abscission
  3. to mobilize solutes from one part to the other
  4. to overcome dormancy.

Answer: 1. to check senescence

Question 39. An excised leaf does not turn yellow if it is induced to root. This is attributed to synthesis in the root of:

  1. ethylene
  2. cytokinins
  3. gibberellins
  4. auxins.

Answer: 2. cytokinins

Human Growth Process MCQs NEET

Question 40. Which one of the following hormones is chiefly concerned with cell division?

  1. Auxin
  2. Cytokinins
  3. G.A.
  4. 2-4

Answer: 2. Cytokinins

Question 41. In phototropism, auxins :

  1. promote the growth of cells
  2. stimulate differential growth of cells on different sides of the plant
  3. inhibit the growth of cells
  4. stimulate and signal the direction of light or gravity of the plant.

Answer: 2. stimulate differential growth of cells on different sides of the plant

Question 42. From which was kinetin isolated :

  1. Coconut milk
  2. Pineapple
  3. Soyabean
  4. Groundnut.

Answer: 1. Coconut milk

Question 43. In a short-day plant growing in a home garden, phytochrome is normally switched from one form to the other by:

  1. red and far-red light
  2. sunlight
  3. activation by gibberellin or abscisic acid
  4. measuring the length of the dark period between light periods.

Answer: 1. red and far-red light

Question 44. Which of the following are two growth inhibitors?

  1. Florigen and ABA
  2. Salicylic acid and ABA
  3. Cinnamic acid and IAA
  4. NAA and Coumarin.

Answer: 2. Salicylic acid and ABA

NEET Biology Important MCQs

Question 45. In unisexual plants, sex can be changed by the application of:

  1. Ethanol
  2. GA
  3. Cytokinins
  4. ABA.

Answer: 2. GA

Question 46. A long-day plant is one that :

  1. requires more than 12 hours of light to flower
  2. increases in height when it flowers
  3. needs a certain minimum length of photoperiod to flower
  4. is not affected by temperature in its flowering response.

Answer: 1. requires more than 12 hours of light to flower

Question 47. Short-day plants require :

  1. Night
  2. Light
  3. Long dark period
  4. Long light period.

Answer: 3. Long dark period

Question 48. During seed germination, its stored food is mobilized by:

  1. ABA
  2. Gibberellin
  3. Ethylene
  4. Cytoxinin

Answer: 4. Cytoxinin

Question 49. Name of the flowering hormone produced in some plants as a result of low-temperature treatment to :

  1. Vemalin
  2. Florigen
  3. Abscisin
  4. Dormin.

Answer: 1. Vemalin

NEET Biology Important MCQs

Question 50. A substance that induces dormancy in the seed is :

  1. GA
  2. ABA
  3. Thiourea
  4. Cytokines

Answer: 2. ABA

NEET Questions Plant Growth and Development Question 51. The growth-controlling substances originating at the stem tips are :

  1. Proteins
  2. Vitamins
  3. Enzymes
  4. Auxins.

Answer: 4. Auxins

Question 52. An abnormally long-stemmed plant with pale yellow leaves is called:

  1. Chlorotic
  2. Etiolated
  3. Necrotic
  4. Abnormal.

Answer: 2. Etiolated

Question 53. The ripening of fruits can be accelerated by :

  1. keeping fruits at high temperature
  2. artificially adding ethylene
  3. keeping fruits at low temperature
  4. reducing H2,O2 supply by dehydration.

Answer: 2. artificially adding ethylene

Question 54. Cytokinin is used to :

  1. cause dormancy
  2. induce cell division
  3. regulate cell movements
  4. increase growth.

Answer: 2. induce cell division

Question 55. Auxins are growth hormones related to :

  1. cell elongation
  2. cell differentiation
  3. cell division
  4. cell mutation.

Answer: 1. cell elongation

NEET Biology Important MCQs

Question 56. Match the items of column 1 and Column 2.

Growth And Development Match The Items Question 56

  1. A- q,   B – r,   C- p,    D- t
  2. A- q,   B-s,    C-p,     D-t
  3. A – q,  B -p,   C -1,    D – r
  4. A – q,  B- t,   C- p,   D – r.

Answer: 3. A – q,  B -p,   C -1,    D – r

Question 57. Gibberellin was first extracted from :

  1. fungi
  2. algae
  3. bacteria
  4. roots of plants.

Answer: 1. fungi

Question 58. Hormones found in the liquid endosperm of coconut are:

  1. Gibberellin
  2. Auxin
  3. Ethylene
  4. Cytokinin.

Answer: 4. Cytokinin.

Question 59. Senescence in plants can be delayed by :

  1. Auxins
  2. Cytokinins
  3. Gibberellins
  4. Ascorbic acid.

Answer: 2. Cytokinins

Question 60. The red-far red (R-FR) responses are not independent of:

  1. IAA
  2. 2, 4-D
  3. GA
  4. Abscisic acid.

Answer: 3. GA

Question 61. The growth hormone auxin occurs in :

  1. root tip and shoot tip
  2. branches
  3. leaf apex
  4. old leaves.

Answer: 1. root tip and shoot tip

MCQs On Human Growth For NEET

Question 62. Gibberellin was discovered and named by :

  1. Darwin
  2. Yabuta and Sumiki
  3. Boysen Jenson
  4. Amon.

Answer: 2. Yabuta and Sumiki

Question 63. Seedless fruits can be had by treating unpollinated flowers with :

  1. sucrose
  2. enzymes
  3. hormones
  4. inhibitors.

Answer: 2. enzymes

Question 64. Photoperiodism is due to :

  1. growth curvature in response to light
  2. response to the relative length of day and night
  3. light period
  4. dark period.

Answer: 1. growth curvature in response to light

Question 65. Photoperiodism is associated with the formation of :

  1. auxin
  2. florigen
  3. cytokinin
  4. enzymes.

Answer: 3. cytokinin

Question 66. When the terminal bud is removed, a plant grows more :

  1. tall
  2. bushy
  3. slowly
  4. rapidly.

Answer: 2. bushy

MCQs On Human Growth For NEET

Question 67. Plant growth is :

  1. Limited
  2. Unlimited
  3. Unlocalised
  4. Diffused.

Answer: 2. Unlimited

Question 68. Genetically dwarf plants can elongate on the application of:

  1. Kinetins
  2. Indole acetic acid
  3. GA3
  4. All the above.

Answer: 3. GA3

Question 69. Maximum root growth occurs :

  1. at the apex
  2. in the presence of light
  3. behind the apex
  4. in the presence of soil.

Answer: 3. behind the apex

Question 70. Apical dominance in higher plants is due to :

  1. Excess of auxins
  2. enzyme activity
  3. C/N ratio
  4. Light.

Answer: 1. Excess of auxins

Question 71. The Crcscofiraph was invented by :

  1. Darwin
  2. J.C, Bose
  3. F.W, Went
  4. C.V, Kaman,

Answer: 2. J.C, Bose

Question 72. Photoperiodic stimulus is perceived by :

  1. Leaves
  2. Flowers
  3. Buds
  4. Meristem.

Answer: 1. Leaves

NEET Previous Year Questions On Growth

Question 73. Which of the following plant growth substances can substitute for vernalization 7

  1. Auxins
  2. Cytokinins
  3. Gibberellins
  4. Ethylene.

Answer: 3. Ethylene.

Question 74. In a pineapple field, spraying NAA (an auxin) induces flowering because it:

  1. stops vegetative growth
  2. promotes flowering
  3. gets converted to ethylene which induces flowering.
  4. stimulates the production of ethylene,

Answer: 3. gets converted to ethylene which induces flowering

Question 75. Leaf aging is retarded by :

  1. cytokinin
  2. florigen
  3. auxin
  4. abscisic acid.

Answer: 1. cytokinin

Question 76. Which one of the following pigments is associated with flowering?

  1. Photochromic
  2. Cytochrome
  3. Chlorophyll
  4. Xanthophyll.

Answer: 1. Phytochromc

Question 77. The red-absorbing form of phytochrome gets converted to the far-red absorbing form after getting irradiated at

  1. 530 nm
  2. 660 nm
  3. 730 nm
  4. 660 nm to 730 nm.

Answer: 2. 660 nm

Plant Growth and Development NEET Questions Question 78. The stimulus of vernalization is received in annual and biennial plants by :

  1. root
  2. tips of young leaves
  3. dry seeds
  4. stem apex.

Answer: 4. stem apex

Question 79. The ‘S’ shaped (sigmoid) growth curve was postulated by:

  1. Sachs
  2. Blackman
  3. Smith
  4. Kogl.

Answer: 1. Sachs

Question 80. Lettuce seeds require a light treatment for germination. This treatment can be replaced by using one of the following phytohormones :

  1. Auxins
  2. Ethylene
  3. Gibberellins
  4. Cytokinins.

Answer: 3. Gibberellins

Question 81. The process of senescence in plants can be reversed by applying :

  1. Ethylene
  2. Auxins
  3. Gibberellins
  4. Cytokinins.

Answer: 4. Cytokinins.

Question 82. The natural form of active auxin, produced by plants, is:

  1. indole acetic acid
  2. colyledauxins
  3. tryptophan
  4. apical acid.

Answer: 1. indole acetic acid

Question 83. Parthenogenetic fruits are prepared by spraying :

  1. auxins
  2. cytokinins
  3. Ethylene
  4. Abscisic acid.

Answer: 1. auxins

Question 84. Elongation of genetically dwarf plants can be done with the help of:

  1. Auxins
  2. Gibberellins
  3. IAA
  4. Cytokinin.

Answer: 2. Gibberellins

Question 85. Which of the following pairs are correctly matched?

  1. Auxin          –   Dwarf rice
  2. Gibberellins   – Elongation
  3. Cytokinin      – Coconut milk
  4. Abscisic acid  – Early leaf fall,

Select the correct answer using the codes given below—

  1. 2, 3, and 4
  2. 1, 2, and 3
  3. 1, Band 4
  4. 1, 3, and 4

Answer: 1. 2, 3, and 4

Question 86. Hormones responsible for plant and seed dormancy during drought are:

  1. IBA
  2. NAA
  3. ABA
  4. Zealand.

Answer: 3. ABA

Question 87. Growth regulator ethylene is used for:

  1. Retarding ripening of tomatoes
  2. Speeding up the ripening of fruits
  3. Slowing down the ripening of apples
  4. Both B and C.

Answer: 2. Speeding up the ripening of fruits

Question 88. If total growth is plotted against time, the curve obtained is known as:

  1. T-shaped curve
  2. U-shaped curve
  3. G-shaped curve
  4. S-shaped curve.

Answer: 4. S-shaped curve

Question 89. The total period of growth is termed as :

  1. Magnified period of growth
  2. Total period of growth
  3. Grand period of growth
  4. Graceful period of growth.

Answer: 3. Grand period of growth

Plant Growth and Development NEET Questions Question 90. The bioassay for gibberellins is:

  1. Avena curvature test
  2. Soybean callus test
  3. a-amylase induction test in barley aleurone cells
  4. Barley leaf disc test for Chlorophylls.

Answer: 3. a-amylase induction test in barley aleurone cells

Question 91. Graph showing the growth of yeast; This is the type of growth curve noted for most organisms.

Growth And Development Graph Showing The Growth Of Yeast Question 91

The log phase of growth is represented by :

  1. Point A to B
  2. Point B to C
  3. Point C to D
  4. Point A to C.

Answer: 2. Point B to C

Question 92. The segment C-D indicates a point where :

  1. No new individuals are formed
  2. The death rate is zero
  3. The rate of formation and rate of death of individuals is the same
  4. The experiment stopped.

Answer: 3. The rate of formation and rate of death of individuals is the same

Question 93. The segment D-E indicates a period of:

  1. Decline
  2. Maturation
  3. Recommencement of growth
  4. Active growth.

Answer: 1. Decline

Question 94. Which of the following is necessary for flower formation in higher plants?

  1. Water and minerals
  2. Florigen
  3. Phyllocaline
  4. None.

Answer: 2. Florigen

Question 95. If a brief flash of light is provided during a dark period to the plant that requires a short day then the plant is likely

  1. to flower
  2. not to flower
  3. to have no effect
  4. produces more flowers.

Answer: 2. not to flower

Question 96. In many plants, the change over from the vegetative phase to the reproductive phase takes place in response to :

  1. the length of the day
  2. the severity of the temperature
  3. mainly the food material available in the soil
  4. the oxygen present in the air.

Answer: 1. the length of the day

Question 97. In short-day plants, flowering is inhibited by :

  1. Interruption of dark by white or red light
  2. Dark interruption by far-red light
  3. Dark interruption by red light followed by far-red light
  4. Not possible.

Answer: 1. Interruption of the dark by white or red light

Question 98, Which of the following plant hormones substitutes for low-temperature treatment?

  1. Auxins
  2. Gibbcrcllins
  3. Cytokinins
  4. None of the above.

Answer: 2. Gibbcrcllins

NEET Questions Plant Growth and Development Question 99. What does the growth of a single cell, organism, and population have in common?

  1. They are influenced by the environment
  2. They require energy and acquire mass
  3. They result in an S-shaped curve if the size is plotted against time.
  4. All of the above.

Answer: 3. They result in an S-shaped curve if the size is plotted against time.

Question 100. A high concentration of auxin is present in :

  1. Root apex
  2. Shoot apex
  3. Petiole
  4. Node.

Answer: 2. Shoot apex

Question 101. Match List 1 with List 2 and select the correct answer using the codes given below the lists :

Growth And Development Match Question 101

Codes :

  1. 2,1,3,4
  2. 2,1,4,3
  3. 1,2,4,3
  4. 1,2,3,4

Answer: 2. 2,1,4,3

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