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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