Class 11 Biology Human Growth Development Multiple Choice Questions

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Biology Human Growth Development Multiple Choice Questions

Question 1. Which breaks the dormancy of potato tuber?

  1. Gibbercllin
  2. IAA
  3. ABA
  4. Zcalin.

Answer: 1. Gibberellin

mcq of biology

Question 2. The hormone responsible for senescence is:

  1. ABA
  2. Auxin
  3. GA
  4. Cytokinin.

Answer: 1. ABA

Question 3. Which of the following prevents the fall of fruits?

  1. GA3
  2. NAA
  3. Ethylene
  4. Zcatin.

Answer: 2. NAA

Class 11 Biology Human Growth and Development

Question 4. The plants respond to photoperiods due to (the presence of:

  1. Stomata
  2. Phytochromes
  3. Phytohormones
  4. Enzymes.

Answer: 2. Phytochromes

multiple choice biology questions

Question 5. Which of the following types of phytohormones resemble nucleic acids in some structural aspects?

  1. Cytokinins
  2. Auxins
  3. Gibberellins
  4. Abscisic acid.

Answer: 2. Auxins

Question 6. Ripening of fruits can be accelerated by :

  1. Heating
  2. Ethylene
  3. Nitrogen
  4. IAA.

Answer: 2. Ethylene

Class 11 Biology Human Growth Development Multiple Choice Questions

 

biology multiple choice questions

Question 7. Coconut milk factor is:

  1. abscisic acid
  2. cytokinins
  3. an auxin
  4. a gibberellin.

Answer: 2. cytokinins

Question 8. In arithmetic growth, following mitotic cell division, only one daughter cell continues to divide while others differentiate by plotting the length of the organ against time, a linear curve is obtained. It is expressed as :

  1. Lt = rt – LO
  2. Lt = tR + LO
  3. LO = Lt + rt
  4. Lt = LO + rt.

Answer: 4. Lt = LO + rt.

Human Growth and Development Diagram

Question 9. The stress-related hormone abscisic acid also :

  1. aids in the development of fruit
  2. helps in the closure of stomata
  3. stimulates cell division
  4. accelerates fruit ripening.

Answer: 2. helps in the closure of stomata

Question 10. Apical dominance is due to a high concentration of:

  1. auxin in terminal bud
  2. gibberellin in the apical bud
  3. auxin in lateral bud
  4. auxin and gibberellin in the lateral bud.

Answer: 1. auxin in terminal bud

Question 11. Regulation of flowering by length of day and night is :

  1. phototropism
  2. photoperiodism
  3. nyctinasty
  4. none of the above.

Answer: 2. photoperiodism

Question 12. Pruning of plants promotes branching due to sensitization of axillary buds by :

  1. Ethylene
  2. Cytokinin
  3. Gibberellin
  4. IAA.

Answer: 4. IAA.

Factors Affecting Human Growth and Development

Question 13. One set of plants was grown at 12 hours day and 12 hours night period cycles and it flowered while in other set night phase was interrupted by a flash of light and did not produce flowers. Under which one of the following categories will you place this plant?

  1. Long day plant
  2. Day-neutral plant
  3. Short day plant
  4.  Darkness neutral plant.

Answer: 3. Short day plant

Question 14. Cell elongation in internodal regions of green plants takes place due to :

  1. Cylokinm
  2. Gibberellin
  3. Indolcacctic acid
  4. Ethylene,

Answer: 2. Gibberellin

Question 15. Senescence is inhibited by :

  1. Ethylene
  2. Gibberellic acid
  3. Abscisic acid
  4. Cytokinin.

Answer: 4. Cytokinin

Question 16. To lest any chemical substance by using the living system is called

  1. Grafting
  2. Cloning
  3. Biopsy
  4. Bioassay.

Answer: 4. Bioassay.

Question 17. Which hormone is the maximum in coconut milk?

  1. Gibberellin
  2. Ethylene
  3. Cytokinin
  4. Auxin.

Answer: 3. Cytokinin

Question 18. Gibberellins can promote seed germination because they influence

  1. the rate of cell division
  2. production by hydrolyzing enzyme
  3. synthesis. abscisic acid
  4. absorption of water through the hard seed coat.

Answer: 2. production of hydrolyzing enzymes

Question 19. Avena curvature lest is a bioassay for examining the activity of:

  1. auxins
  2. gibberellins
  3. cytokinins
  4. ethylene,

Answer: 1. auxins

Stages of Human Growth and Development

Question 20. An enzyme that can stimulate the germination of barley seeds is:

  1. Inverlasc
  2. Protease
  3. a-amylase
  4. Lipase.

Answer: 3. a-amylase

Question 21. In which of the following fruits is the edible part of the aril?

  1. Orange
  2. Litchi
  3. Pomegranate
  4. Custard apple.

Answer: 2. Litchi

Question 22. Treatment of seed at low temperature under moist conditions to break its dormancy is called :

  1. Chelation
  2. Stratification
  3. Scarification
  4. Vernalization.

Answer: 4. Vernalization

Question 23. Parthenocarpic tomato fruits can be produced by :

  1. raising the plants from vernalized seeds
  2. treating the plants with phenylmercuric acetate
  3. removing androecium of flowers before pollen grains are released
  4. treating the plants with low concentrations of gib-acrylic acid and auxins.

Answer: 4. Treat the plants with low concentrations of gib- bicyclic acid and auxins.

Question 24. How does pruning help in making the hedge dense?

  1. The apical shoot grows faster after pruning
  2. It releases wound hormones
  3. It induces the differentiation of new shoots from the rootstock
  4. It frees axillary buds from apical dominance

Answer: 4. It frees axillary buds from apical dominance

Human Growth and Development Class 11 Notes

Question 25. Which one of the following pairs, is not correctly matched?

  1. Gibberellic Acid-Leaf fall
  2. Cytokinin-Cell division
  3. IAA-Ccll wall elongation
  4. Abscisic Acid-Stomatal closure.

Answer: 1. Gibberellic Acid-Leaf fall

Question 26. The wavelength of light absorbed by the Pr form of phytochrome is:

  1. 680 nm
  2. 720 nm
  3. 620 nm
  4. 640 nm

Answer: 1. 680 nm

Question 27. “Foolish Seedling” disease of rice led to the discovery of:

  1. ABA
  2. 2, 4 – D
  3. IAA
  4. GA.

Answer: 4. GA.

Question 28. One hormone helps in the ripening of fruits while the other stimulates the closure of stomata. These are respectively :

  1. abscisic acid and auxin
  2. ethylene and abscisic acid
  3. abscisic acid and ethylene
  4. ethylene and gibberellic acid
  5. gibberellic acid and abscisic acid.

Answer: 2. ethylene and abscisic acid

Question 29. Pick out the correct statements :

A. Cytokinins especially help in delaying senescence

B. Auxins are involved in regulating apical dominance

C. Ethylene is especially useful in enhancing seed germination

D. Gibberellins are responsible for the immature falling of leaves.

  1. (A) and (C) only
  2. (A) and (D) only
  3. (B) and (C) only
  4. (A) and (B) only
  5. (B) and (D) Only.

Answer: 4. (B) and (D) Only.

Question  30. Match List I and List II and select the correct option.

Growth And Development Match The Correct Answer

  1. (A)-3 (B)-1,  (C)-5,  (D)-4,  (E)-2
  2. (A)-4 (B)-5,  (C)-1  (D)-3,  (E)-2
  3. (A)-2. (B)- 1, (C)-5,  (D)-3.  (E)-4
  4. (A)-3, (B)- l  (C)-5.  (D)-2,  (E)-4
  5. (A)-4. (B)- 1,  (C)-5  (D)- 3,  (E)-2.

Answer: 1. A)-3 (B)-1,  (C)-5,  (D)-4,  (E)-2

Question 31. Senescence is an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in:

  1. annual plants
  2. floral parts
  3. vessels and tracheid differentiation
  4. leaf abscission.

Answer: 2. floral parts

Question 32. The importance of day length in the flowering of plants was first shown in

  1. cotton
  2. Petunia
  3. Lemna
  4. tobacco.

Answer: 4. tobacco.

Question 33. One hormone is used to speed up the malting process in barley, another is used to promote flowering in pineapple, and the third helps in the delay of leaf senescence. These are respectively.

  1. auxin, gibberellin, and cytokinin
  2. gibberellin, cytokinin, and auxin.
  3. gibberellin, auxin, and cytokinin
  4. cytokinin, auxin, and gibberellin
  5.  auxin, cytokinin, and gibberellin.

Answer: 3. gibberellin, auxin, and cytokinin

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