CBSE Class 11 Biology Plant Growth And Development Worksheet Set 03

Plant Growth And Development MCQ Questions with Answers Class 11 Biology

Question. Which auxins are used in diluted form to produce parthenocarpic fruits?

(1) IAA and IBA

(2) 2, 4-D and IBA

(3) NAA and GA

(4) 2, 4-D and IAA

Answer (1)

Question. Which of the following is not a function of gibberellic acid?

(1) Bolting

(2) Delayed senescence

(3) Seed germination

(4) Ripening

Answer (4)

Question. Which of the following auxin is widely used as weedicide?

(1) IAA

(2) IBA

(3) 2, 4-D

(4) NAA

Answer (3)

Question. Phytohormones responsible for cell division in callus are ______ and ______.

(1) ABA and cytokinin

(2) Gibberellin and ethylene

(3) Auxin and cytokinin

(4) Ethylene and cytokinin

Answer (3)

Question. Apical dominance is stimulated by auxin whereas it is inhibited by

(1) Ethylene

(2) ABA

3) Gibberellic acid

(4) Cytokinin

Answer (4)

Question.  Which of the following is incorrect about ethylene?

(1) Promotes root hair formation

(2) It is natural and derivative of carotenoids

(3) It increases the number of female flowers

(4) It causes synchronisation of flowering and fruit set in pineapples

Answer (2)

Question. Which of the following phytohormone is a derivative of carotenoids?

(1) Auxin

(2) ABA

(3) Ethylene

(4) Cytokinin

Answer (2)

Question. Dormancy of seeds is broken by ethylene whereas it is induced by

(1) Abscisic acid

(2) Auxin

(3) Cytokinin

(4) Gibberellic acid

Answer (1)

Question. The plant hormone which closes the stomata in stressful conditions is

(1) Cytokinin

(2) GA (3) Auxin

(4) ABA

Answer (4)

Question. Which phytohormone is synthesised in ripened fruits?

(1) ABA

(2) Auxin

(3) Cytokinin

(4) Ethylene

Answer (4)

Question. Both ethylene and ABA are responsible for

(1) Promoting the abscission of leaves and fruits

(2) Inducing dormancy of seeds

(3) Stimulation of apical dominance

(4) Ripening

Answer (1)

Question. Select a correct match

(1) GA₃– Early seed production in conifers.

(2) Cytokinin – Synchronise fruit set in pineapples.

(3) Auxin – Overcomes senescence.

(4) Ethylene – Seed maturation and development

Answer (1)

Question. _________ is a period when growth and development is temporarily stopped.

(1) Dormancy

(2) Abscission

(3) Senescence

(4) Vernalisation

Answer (1)

Question. Florigen results in conversion of

(1) Reproductive bud → Vegetative bud

(2) Shoot apex → Flowering bud

(3) Root apex → Reproductive bud

(4) Vegetative bud → Lateral shoot

Answer (2)

Question. Which of the following is an example of short day plant?

(1) Tobacco

(2) Sugarbeet

(3) Wheat

(4) Radish

Answer (1)

Question. Cucumber and tomato are the examples of

(1) Day neutral plants

(2) Short day plants

(3) Long day plants

(4) Long short day plants

Answer (1)

Question. Which type of plants can blossom throughout the year?

(1) Long day plants

(2) Short-long day plants

(3) Short-day plants

(4) Day neutral plants

Answer (4)

Question. The site of preception of light in plants for flowering is

(1) Stems

(2) Roots

(3) Leaves

(4) Fruits

Answer (3)

Question. Some plants like sugarbeet and cabbage required low temperature for flowering. This phenomenon is called

(1) Photoperiodism

(2) Parthenocarpy

(3) Vernalisation

(4) Abscission

Answer (3)

Question. Most of the winter flowering plants belong to

(1) Short long day plants

(2) Long day plants

(3) Short day plants

(4) Day neutral plants

Answer (3)

Question. Which of the following is incorrect about vernalisation?

(1) It prevents precocious reproductive development

(2) It is observed in winter variety of wheat

(3) Flowering is stimulated by low temperature

(4) It is the resting stage of seeds

Answer (4)

Question. During vernalisation, the stimulus of low temperature is perceived by

(1) Stem apex

(2) Leaves

(3) Roots

(4) Bark

Answer (1) 

Question. The hormonal substance which migrates from leaves to shoot apices to induce flowering is

(1) Dormin

(2) Zeatin

(3) Kinetin

(4) Florigen

Answer (4)

More Question 

Q1. How is growth accomplished? Give characteristics of plant growth.

Q2. In what terms in growth measured?

Q3. What are 3 phases of plant growth? How are they exhibited at the region of roots?

Q4 (a) What is growth rate? What is arithmetic & geometric growth?

     (b) How is linear growth represented graphically? Give the equation of linear were mathematically.

     (c) Draw sigmoid growth curve & explain its different phases.

Q5. What are the essential conditions required for plant growth?

Q6. What is plant development & which factors control it?

Q7. Define plant growth regulators (PGRs) & give examples with chemical composition.

Q8 (a) What is the site of production of auxins?

     (b) What is the role of Charles Darwin & F.M. Went in the discovery of auxins?

     (c) Name the phytohormone isolated for first time from human urine.

     (d) Name 2 natural & 2 synthetic auxins.

     (e) In most plants terminal bud suppresses devt of lateral buds. Name the phenomenon & phytohormone which promotes it.

Q9. Name the weedicide used for dicot weeds.

Q10 (a) Which phytohormone caused foolish seedling diseases ? Name the fingers from which it was isolated.

      (b) Give physiological effect of GA. (c) Give applications / uses of GA.

Q11 (a) Who gave the name ‘Kinetin’.

      (b) Which phytohormone was isolated from corn kernel & coconut milk?

      (c) Name the phytohormone which increases lateral branching.

      (d) Why is ABA called stress hormone?

Q12. How is ABA useful to plants?

Q13. Name the gaseous phytohormone.

Q14. What does an overripe apple release which affects all other apples in the basket.

Q15. What would be expected to happen if: - (a) GA3 is applied to rice seedlings. (b)You forget to add cytokinin to culture medium.

Q16. What is photoperiodism? Explain different categories of plants on basis of photoperiodism giving one example of each.

Q17. What is vernalisation? Give its significance.

Q18. Define – Differentiation, dedifferentiation & Redifferentiation.

Q19. Describe the major disordered of human digestive system.

Q20. How is our gut lining protected from its own secretions of proteases?