Class 11 Biology Chapter 15 Plant Growth and Development MCQ Questions with Answer

Plant Growth and Development Class 11 MCQ is one of the best strategies to prepare for the CBSE Class 11 Board exam. If you want to complete a grasp concept or work on one’s score, there is no method except constant practice. Students can improve their speed and accuracy by doing more MCQ on Plant Kingdom Class 11, which will help them all through their board test.

Plant Growth and Development Class 11 MCQ Questions with Answers

Class 11 Biology MCQ with answers are given here to chapter 15 Plant Growth and Development. These MCQs are based on the latest CBSE board syllabus and relate to the latest Class 11 BIology syllabus. By Solving these Class 11 MCQs, you will be able to analyze all of the concepts quickly in the chapter and get ready for the Class 11 Annual exam.

Learn Class 11 Plant Growth and Development MCQs with answers pdf free download according to the latest CBSE and NCERT syllabus. Students should prepare for the examination by solving CBSE Class 11 Biology Plant Growth and DevelopmentMCQ with answers given below

Question 1. ABA is involved in 
(a) shoot elongation
(b) increased cell division
(c) dormancy of seeds
(d) root elongation.

Question 2. The process of growth is maximum during   
(a) log phase
(b) lag phase
(c) senescence
(d) dormancy.

Question 3. Which hormone is responsible for fruit ripening?   
(a) Ethylene
(b) Auxin
(c) Ethyl chloride
(d) Cytokinin

Question 4. Which of the following prevents the fall of fruits? 
(a) GA3
(b) NAA
(c) Ethylene
(d) Zeatin

Question 5 . During seed germination, its stored food is mobilized by 
(a) ABA
(b) gibberellin
(c) ethylene
(d) cytokinin.

Question 6. Dwarfness can be controlled by treating the plant with 
(a) cytokinin 
(b) gibberellic acid
(c) auxin
(d) anti-gibberellin.

Question 7. The pineapple which under natural condition is difficult to blossom has been made to produce fruits throughout the year by application of 
(a) NAA, 2, 4-D
(b) Phenyl acetic acid
(c) Cytokinin
(d) IAA, IBA.

Question 8. Klinostat is employed in the study of 
(a) osmosis
(b) growth movements
(c) photosynthesis
(d) respiration.

Question 9. Which is produced during water stress that brings stomatal closure?   
(a) Ethylene
(b) Abscisic acid
(c) Ferulic acid
(d) Coumarin

Question 10. Typical growth curve in plants is   
(a) stair-steps shaped
(b) parabolic
(c) sigmoid
(d) linear.

Question 11. A plant hormone used for inducing morphogenesis in plant tissue culture is   
(a) cytokinins
(b) ethylene
(c) abscisic acid
(d) gibberellins.

Question 12. Which combination of gases is suitable for fruit ripening? 
(a) 80% CH₄ and 20% CO₂
(b) 80% CO₂ and 20% O₂
(c) 80% C₂H₄ and 20% CO₂
(d) 80% CO₂ and 20% CH₂

Question 13. Which of the following is not an inhibitory substance governing seed dormancy?   
(a) Gibberellic acid
(b) Abscisic acid
(c) Phenolic acid
(d) Para-ascorbic acid

Question 14. Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in   
(a) annual plants
(b) floral parts
(c) vessels and tracheid differentiation
(d) leaf abscission.

Question 15. Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop. 
(a) Cytokinin
(b) Gibberellin
(c) Ethylene
(d) Abscisic acid

Question 16. You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots? 
(a) IAA and gibberellin
(b) Auxin and cytokinin
(c) Auxin and abscisic acid
(d) Gibberellin and abscisic acid 

Question 17. It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase  yield?   
(a) Cytokinin and Abscisic acid
(b) Auxin and Ethylene
(c) Gibberellin and Cytokinin
(d) Gibberellin and Abscisic acid

Question 18. Fruit and leaf drop at early stages can be prevented by the application of 
(a) ethylene  
(b) auxins
(c) gibberellic acid
(d) cytokinins.

Question 19. Phototropic and geotropic movements are linked to   
(a) gibberellins
(b) enzymes
(c) auxin
(d) cytokinins.

Question 20. The Avena curvature is used for bioassay of   
(a) IAA
(b) ethylene
(c) ABA
(d) GA3.

Question 21. Auxin can be bioassayed by   
(a) potometer
(b) lettuce hypocotyl elongation
(c) Avena coleoptile curvature
(d) hydroponics.

Question 22. Abscisic acid controls   
(a) cell division
(b) leaf fall and dormancy
(c) shoot elongation
(d) cell elongation and wall formation.

Question 23. The method that renders the seed coat permeable to water so that embryo expansion is not physically retarded is called 
(a) vernalization
(b) stratification
(c) denudation
(d) scarification

Question 24. In arithmetic growth rate, when length of the organ is plotted against time, the nature of graph curve will be —   
(a) linear
(b) sigmoidal
(c) parabolic
(d) hyperbolic

Question 25. The measure of the ability of the plant to produce new plant material is referred as —   
(a) efficiency index
(b) absolute growth rate
(c) arithmetic growth
(d) linear growth

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Question 26. Growth is accompanied by 
(a) anabolic process and energy
(b) catabolic process which occurs at the expense of energy.
(c) metabolic processes which occur at the expense of energy
(d) energy only

Question 27. Germination takes place when the   
(a) previously dormant embryo is activated.
(b) cotyledons emerge above the ground.
(c) hypocotyl or epicotyl emerges above the ground.
(d) vascular tissues begin to transport fluids.

Question 28. Which of the following is not an influence of auxins? 
(a) Apical dominance
(b) Parthenocarpy
(c) Phototropism
(d) Fruit ripening

Question 29. Through their effects on plant growth regulators, what do the temperature and light control in theB plants? 
(a) Apical dominance
(b) Flowering
(c) Closure of stomata
(d) Fruit elongation

Question 30. Which one of the following generally acts as an antagonist to gibberellins? 
(a) Zeatin
(b) Ethylene
(c) ABA
(d) IAA

Question 31. In which of the following process, the cell loose their protoplasm to form tracheary element? 
(a) Dedifferentiation
(b) Redifferentiation
(c) Differentiation
(d) Plasticity

Question 32. The hormones which was first isolated from human urine is.   
(a) indole-3-acetic acid
(b) gibberellin
(c) ethylene
(d) kinetin

Question 33. Which one of the following is chemically identical to ABA? 
(a) Indole-3-acetic acid
(b) Kinetin
(c) Dormin
(d) 2, 4-D

Question 34. What causes a green plant exposed to the light, on only one side, to bend towards the source of light as it grows?   
(a) Light stimulates plant cells on the lighted side to grow faster.
(b) Auxin accumulates on the shaded side, stimulating greater cell elongation there.
(c) Green plants need light to perform photosynthesis.
(d) Green plants seek light because they are phototropic.

Question 35. 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.

Question 36. Which of the following movement is not related to auxin level?   
(a) Bending of shoot towards light
(b) Movement of root towards soil
(c) Nyctinastic leaf movements
(d) Movement of sunflower head tracking the sun

Question 37. The ability of plant to follow different pathways and produce different structures in response to environment and phases of life is termed as — 
(a) elasticity
(b) growth efficiency
(c) plasticity
(d) heterophylly

Question 38. One of the commonly used plant growth hormone in tea plantations is 
(a) ethylene
(b) abscisic acid
(c) zeatin
(d) indole-3-acetic acid.

Question 39. Root development is promoted by 
(a) abscisic acid
(b) auxin
(c) gibberellin
(d) ethylene.

Question 40. Which one of the following growth regulators is known as ‘stress hormone’?   
(a) Abscisic acid
(b) Ethylene
(c) GA3
(d) Indole acetic acid

Question 41. Phototropic curvature is the result of uneven distribution of   
(a) gibberellin
(b) phytochrome
(c) cytokinins
(d) auxin.

Question 42. Which one of the following pairs, is not correctly matched?   
(a) Gibberellic acid – Leaf fall
(b) Cytokinin – Cell division
(c) IAA – Cell wall elongation
(d) Abscissic acid – Stomatal closure

Question 43. Parthenocarpic tomato fruits can be produced by 
(a) treating the plants with phenylmercuric acetate
(b) removing androecium of flowers before pollen grains are released
(c) treating the plants with low concentrations of gibberellic acid and auxins
(d) raising the plants from vernalized seeds.

Question 44. One of the synthetic auxin is 
(a) IAA
(b) GA
(c) IBA
(d) NAA.

Question 45. Which one of the following acids is a derivative of carotenoids? 
(a) Indole-3-acetic acid
(b) Gibberellic acid
(c) Abscisic acid
(d) Indole butyric acid

Question 46. Coconut milk factor is   
(a) an auxin
(b) a gibberellin
(c) abscisic acid
(d) cytokinin.

Question 47. Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone   
(a) auxin
(b) cytokinin
(c) ethylene
(d) abscisic acid.

Question 48. How does pruning help in making the hedge dense? 
(a) It releases wound hormones.
(b) It induces the differentiation of new shoots from the rootstock.
(c) It frees axillary buds from apical dominance.
(d) The apical shoot grows faster after pruning.

Question 49. Differentiation of shoot is controlled by 
(a) high auxin : cytokinin ratio
(b) high cytokinin : auxin ratio
(c) high gibberellin : auxin ration
(d) high gibberellin : cytokinin ratio.

Question 50. Cell elongation in internodal regions of the green plants takes place due to   
(a) indole acetic acid
(b) cytokinins
(c) gibberellins
(d) ethylene.

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