MCQ ON VERNALIZATION class 11 for NEET

MCQ ON VERNALIZATION class 11 for NEET | VERNALIZATION class 11 | MCQ VERNALIZATION with Answer | Check the below NCERT MCQ question for class 11Biology based on the with Answers.

MCQ on VERNALIZATION class 11 Biology with answers were prepared based on the latest pattern.We have provided class 11 Biology MCQs question with Answers to help students understand the concept very well.

MCQ ON VERNALIZATION is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM 2022-23 , 2023-24

INTRODUCTION:-
Many species , especially many biennials and perennials, are induced or promoted to flower by the exposure to low temperature.
They grow vegetatively during the warm seasons, receive the low temperature treatment during the winter and grow further to bear flowers and fruits in the following warm season.

Lysenko a Russian worker, used the term vernalization for a low temperature promotions of flowering in plants.

The low temperature requirement for flowering was first noticed by Klippart in 1857 while working with two varieties of wheat- the winter wheat and the spring wheat.

In nature the plants requiring vernalization commonly behave as biennials.The biennials complete their life cycle in two years.

If a biennials is maintained in the green house without a cold treatment , it will grow vegetatively for years.

The actual site of cold stimulus in most of the plants is merismetic cells in the bud , apex of embryo , developing leaves etc.

Several experimental evidence suggests that a flowering stimulus is synthesized in the merismetic cells as a result of specific cold treatment.

MCQ ON VERNALIZATION class 11 for NEET

1. Low temperature promotion of flowering in plants

(a) vernalisation
(b) photoperiodism
(c) short day plants
(d) long day plants

Ans (a) vernalisation

2. The term vernalisation is used by

(a) Koog
(b) Benda
(c) Lysenko
(d) Weiner

Ans. (c) Lysenko

3. The low temperature requirement for flowering was first noticed by

(a) Klippart
(b) Lysenko
(c) Koog
(d) Benda

Ans. (a) Klippart

4. In nature the plants requiring vernalization commonly behave as

(a) triannuals
(b) biennials
(c) annual
(d) multiennials

Ans.(b) biennials

5.The biennials complete their life cycle in

(a) two years
(b) one year
(c) three years
(d) multiyears

Ans.(a) two years

6. The actual site of vernalization in most of the plants

(a) merismetic cells in the buds
(b) apex of embryo
(c) developing leaves
(d) all the above

Ans.(d) all the above

7. Vernalization stimulus flowering in

(a) zamikind
(b) turmeric
(c) carrot
(d) ginger

Ans.(c) carrot

8. The Avena curvature is used for bioassay of

(a) GA3
(b) IAA
(c) Ethylene
(d) ABA

Ans.(b) IAA

9.Phytochrome is a

(a) Flavoprotein
(b) Glycoprotein
(c) Lipoprotein
(d) Chromoprotein

Ans. (d) Chromoprotein

10. Which of the given is a long day plant.

(a) Glycine max
(b) Spinach
(c) Chrysanthemum
(d) Tobacco

Ans. (b) Spinach

11. Phytotropic curvature is the result of uneven distribution of

(a) auxin
(b) gibberelins
(c) phytochromes
(d) cytokinins

Ans.(a) auxins

12. Through their effects on plant growth regulators , what do the temperature and light controls in the plants ?

(a) Apical dominance
(b) Flowering
(c) Closure of stomata
(d) Fruit elongation

Ans . (b) flowering

13.Hypothetical plant hormones are

(a) florigen
(b) vernalin
(c) florigen and vernalin
(d) auxin

Ans.(c) Florigen and vernalin

14. Coconut milk contains

(a) ABA
(b) Ethylene
(c) Gibberelins
(d) Cytokinin

Ans. (d) Cytokinins

15.Auxin is synthesized in which part of the plant ?

(a) Apical
(b) Nodal
(c) Internodal
(d) Axillary

Ans.(a) Apical

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16. Foolish seedling disease of rice led to the discovery of

(a) Abscisic acid
(b) Cytokinins
(c) 2,4 -D
(d) Gibberelins

Ans.(d) Gibberelins