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

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

Check the below NCERT MCQ Questions for Class 11 Biology Chapter 15 Plant Growth and Development with Answers Pdf free download. MCQ Questions for Class 11 Biology with Answers were prepared based on the latest exam pattern. We have provided Plant Growth and Development Class 11 Biology MCQs Questions with Answers to help students understand the concept very well.


Q1. Auxin inhibits the growth of

(a) Apical bud
(b) Lateral axillary buds
(c) Roots on stem cutting
(d) Parthenocarpic development of fruits

(b) Lateral axillary buds


Q2. Which of the growth substance acts as a stimulant during nodule formation in leguminous plant?

(a) Ethylene
(b) ABA
(c) IAA
(d) Morphactin

(c) IAA


Q3. Primary precursor of I.A.A is

(a) Phenyl alanine
(b) Tyrosine
(c) Tryptophan
(d) Leucin

(c) Tryptophan


Q4. Avena coleoptile test to find out the quantity of growth promoting hormones was discovered by

(a) F.W. Went
(b) L.J. Oudus
(c) K.V. Thimann
(d) F. Skoog

(a) F.W. Went


Q5. Induction of rooting in stem cutting by auxin treatment would be beneficial in which of the following?

(a) Marchantia
(b) Wheat
(c) Cuscuta
(d) Bougainvillea

(d) Bougainvillea


Q6. One set of a plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by flash of light and it did not produce flower. Under which one of the following categories will you place this plant?[2004]

(a) Long day
(b) Darkness neutral
(c) Day neutral
(d) Short day

(d) Short day


Q7. Which weedicide can defoliate the complete forest ?

(a) 2, 4–D
(b) MH
(c) AMO – 1618
(d) ABA

(c) AMO – 1618


Q8. Which of the following effects of auxins is of wide application?

(a) Induction of fruit development
(b) Induction of root initiation
(c) Prevention of abscission
(d) All of the above

(d) All of the above


Q9. Which of the following prevents the fall of fruits ?

(a) GA3
(b) NAA
(c) Ethylene
(d) Zeatin

(b) NAA


Q10. If the tip of a seedling is cut off growth as well as bending ceases because it hampers

(a) Respiration
(b) Photosynthesis
(c) Perception of light stimulus
(d) Transpiration

(c) Perception of light stimulus


Q11. Identify the cytokinin given below

(a) IAA
(b) Zeatin
(c) Kinetin
(d) None of these

(c) Kinetin


Q12. All changes that an organism goes through during its life cycle is called as

(a) Development
(b) Elongation
(c) Differentiation
(d) Maturation

(c) Differentiation


Q13. Parthenocarpy can be induced to develop seedless fruit by application of

(a) Ethylene and gibberellins
(b) Zeatin and IAA
(c) IBA and cytokinin
(d) IAA and IBA

(d) IAA and IBA


Q14. Phototropic curvature is the result of uneven distribution of:

(a) gibberellin
(b) phytochrome
(c) cytokinins
(d) auxin

(d) auxin


Q15. Apical dominance means

(a) Suppression of growth of apical bud by axillary buds
(b) Suppression of growth of axillary buds by the presence of apical bud.
(c) Stimulation of growth of axillary buds by removal of apical bud
(d) Inhibition of growth of axillary buds by removal of apical bud.

(b) Suppression of growth of axillary buds by the presence of apical bud.


Q16. Which growth hormone accerlates the malting process in brewing industry?

(a) Auxins
(b) Gibberellins
(c) Ethylene
(d) Cytokinins

(b) Gibberellins


Q17. Which plant growth regulator is the derivative of carotenoids?

(a) Auxin
(b) Gibberelic acid
(c) Cytokinin
(d) Abscisic acid

(d) Abscisic acid


Q18. Typical plant growth shows _ curve.

(a) J-shaped
(b) S-shaped
(c) I-shaped
(d) Parabolic

(b) S-shaped


Q19. Mobilisation of stored food in germinating seeds is triggered by

(a) auxins
(b) cytokinins
(c) gibberellins
(d) ethylene

(c) gibberellins


Q20. Cavity formed between somatic and splanchnic mesoderm is called

(a) Gastrocoele
(b) Blastocoele
(c) Coelom
(d) Neurocoele

(c) Coelom


Q21. Photoperiodism stimulus is perceived by

(a) Meristem
(b) Flower
(c) Leaves
(d) Buds

(c) Leaves


Q22. Which one of the following nutrients is concerned with the growth of the plants in view of their role in synthesis of auxin:

(a) S
(b) Mn
(c) Zn
(d) K

(c) Zn


MCQ Questions for Class 11 Biology with Answers Chapter Wise


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