Plant Growth and Development MCQ Class 11 Biology Chapter 15 Answer

Find here the NCERT chapter-wise Multiple Choice Questions from Class 11 Biology Book Chapter 15 Plant Growth and Development with Answers Pdf free download. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Plant Growth and Development. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

NCERT Chapters for Class 11 Biology

Q1. Auxin is synthesised in the apical meristems from amino acid

(i) Isoleucine
(ii) Methionine
(iii) Niacin
(iv) Tryptophan

(iv) Tryptophan

Q2. Opening of floral buds into flowers, is a type of:

(i) Autonomic movement of variation
(ii) Autonomic movement of locomotion
(iii) Autonomic movement of growth
(iv) Paratonic movement of growth

(iii) Autonomic movement of growth

Q3. Induction of rooting in stem cutting by auxin treatment would be beneficial in which of the following?

(i) Marchantia
(ii) Wheat
(iii) Cuscuta
(iv) Bougainvillea

(iv) Bougainvillea

Q4. Which one of the following is a long day plant?

(i) Wheat
(ii) Soyabean
(iii) Bajra
(iv) Tobacco

(i) Wheat

Q5. Auxins hormone was first discoverd by

(i) Kogletal
(ii) Went
(iii) Darwin
(iv) Boysen Jenson

(ii) Went

Q6. Typical plant growth shows _ curve.

(i) J-shaped
(ii) S-shaped
(iii) I-shaped
(iv) Parabolic

(ii) S-shaped

Q7. Avena coleoptile test to find out the quantity of growth promoting hormones was discovered by

(i) F.W. Went
(ii) L.J. Oudus
(iii) K.V. Thimann
(iv) F. Skoog

(i) F.W. Went

Q8. The hormone which controls cell division and cell differentiation is

(i) cytokinin
(ii) auxin
(iii) ABA
(iv) gibberellin

(i) cytokinin

Q9. Indole 3 acetic acid (IAA) is a naturally occuring plant hormone called

(i) Gibberellins
(ii) Auxins
(iii) Cytokinins
(iv) Abscisic acid

(ii) Auxins

Q10. Cells of fibers and tracheids elongate during

(i) Phase of cell division
(ii) Phase of cell elongation
(iii) Phase of cell maturation
(iv) Phase of cell differentiation

(i) Phase of cell division

Q11. Primary precursor of I.A.A is

(i) Phenyl alanine
(ii) Tyrosine
(iii) Tryptophan
(iv) Leucin

(iii) Tryptophan

Q12. A chemical believed to be involved in flowering is

(i) florigen
(ii) gibberellin
(iii) kinetin
(iv) IBA

(i) florigen

Q13. Growth regulator which is known to promote cell division in vascular cambium is

(i) IAA
(ii) ABA
(iii) Cytokinins
(iv) Ethylene

(i) IAA

Q14. Intercalary meristems are of

(i) Permanent nature
(ii) Temporary nature
(iii) Some are permanent some temporary
(iv) None of these

(ii) Temporary nature

Q15. Auxin inhibits the growth of

(i) Apical bud
(ii) Lateral axillary buds
(iii) Roots on stem cutting
(iv) Parthenocarpic development of fruits

(ii) Lateral axillary buds

Q16. To avoid excessive water loss during severe drought stress,the closure of stomata is signalled by the production of

(i) ABA
(ii) IAA
(iii) NAA
(iv) IBA

(i) ABA

Q17. The formation of seedless fruits without the act of fertilization is known as

(i) Parthenocarpy
(ii) Pseudocarpy
(iii) Apomixis
(iv) Parthenogenesis

(i) Parthenocarpy.

Q18. Which one is incorrect?

(i) Epiblast is presumptive ectoderm and mesoderm
(ii) Hypoblast is presumptive endoderm
(iii) Hypoblast is presumptive mesoderm
(iv) Upper layer of cells in blastoderm is epiblast

(iii) Hypoblast is presumptive mesoderm

Q19. Which weedicide can defoliate the complete forest ?

(i) 2, 4–D
(ii) MH
(iii) AMO – 1618
(iv) ABA

(iii) AMO – 1618

Q20. The conditions necessary for vernalization are

(i) water and carbon dioxide
(ii) oxygen and water.
(iii) low temperature and oxygen
(iv) high temperature and water

(i) water and carbon dioxide

Q21. Gibberellin was isolated in pure form by

(i) Brian et al
(ii) Went
(iii) Yabuta
(iv) Kurosava

(i) Brian et al

Q22. The stage of rapid cell division just after fertilization is

(i) Organogenesis
(ii) Cleavage
(iii) Gastrulation
(iv) Growth

(ii) Cleavage

Q23. If the tip of a seedling is cut off growth as well as bending ceases because it hampers

(i) Respiration
(ii) Photosynthesis
(iii) Perception of light stimulus
(iv) Transpiration

(iii) Perception of light stimulus

Q24. Which of the following hormones does not naturally occur in plants?

(i) 2,4–D (2, 4–dichloropheoxy acetic acid)
(ii) IAA
(iii) ABA
(iv) GA

(i) 2,4–D (2, 4–dichloropheoxy acetic acid)

Q25. Cytokinins are in nature

(i) Acidic
(ii) Neutral
(iii) Basic
(iv) All of these

(iii) Basic

Q26. Plants grow throughout their life due to

(i) presence of meristems
(ii) presence of vascular cambium
(iii) presence of xylem and phloem
(iv) presence of tracheids

(i) presence of meristems

Q27. Identify the cytokinin given below

(i) IAA
(ii) Zeatin
(iii) Kinetin
(iv) None of these

(iii) Kinetin

Q28. A plant completing its life cycle before the onset of dry condition is said to be

(i) drought escaping
(ii) short day plant
(iii) long day plant
(iv) All of these

(i) drought escaping

Q29. Cytokinins help in promoting

(i) Cell division
(ii) Stem elongation
(iii) Cell enlargement
(iv) Parthenocarpy

(i) Cell division

Q30. Liver and pancreas arise from

(i) Foregut
(ii) Midgut
(iii) Hindgut
(iv) None of these

(i) Foregut

Q31. Parthenocarpy can be induced to develop seedless fruit by application of

(i) Ethylene and gibberellins
(ii) Zeatin and IAA
(iii) IBA and cytokinin
(iv) IAA and IBA

(iv) IAA and IBA

Q32. In a plant growing under dark condition, the leaves turn light coloured, internodes become much elongated and it is termed as

(i) etiolation
(ii) chlorosis
(iii) vernalization
(iv) phyllotaxy

(i) etiolation

Q33. The first natural cytokinins obtained from unripe maize grains is known as

(i) Indole 3-acetic acid
(ii) ABA
(iii) Zeatin
(iv) Kinetin

(iii) Zeatin

Q34. Which one of the followings is a gaseous plant hormone?

(i) Ethylene
(ii) Gibberellin
(iii) IAA
(iv) Abscisic acid

(i) Ethylene

Q35. Seedless fruits can be obtained by treating the unpollinated ovaries with

(i) Colchicine
(ii) Sucrose solution
(iii) Hormones
(iv) Pure lanolin

(iii) Hormones

Q36. Which of the following hormones can replace vernalization?

(i) Auxin
(ii) Cytokinin
(iii) Gibberellins
(iv) Ethylene

(iii) Gibberellins

Q37. Abscisic acid (ABA) was first isolated from cotton balls by

(i) Addicot et al
(ii) Letham et al
(iii) Brian et al
(iv) Kurosava

(i) Addicot et al

Q38. Growth in dorsiventral leaf is measured in terms of

(i) length of leaf
(ii) increase in cell number
(iii) surface area increase
(iv) none of these

(iii) surface area increase

Q39. Apical dominance in higher plants is due to

(i) Phyto hormones
(ii) Enzymes
(iii) Carbohydrates
(iv) Photoperiodism

(i) Phyto hormones

Q40. The cold induced stimulus used in vernalization is

(i) Vernalin
(ii) Carotene
(iii) Ethylene
(iv) Florigen

(i) Vemalin

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