Plant growth and development - plant hormones auxin gibberellin cytokinin ethylene abscisic acid photoperiodism vernalization - One Line Questions

1. Which hormone is involved in delaying senescence and maintaining the 'greenness' of leaves? — Cytokinin
2. Which hormone can be used commercially to promote flowering in pineapple plants? — Ethylene
3. Which plant hormone can break seed dormancy and promote germination? — Gibberellin
4. Cytokinins are plant hormones that primarily promote: — Lateral bud growth and cell division
5. Which hormone promotes bolting (elongation of the internodes) in plants like cabbage? — Gibberellin
6. The hormone that counteracts the effect of ABA in breaking seed dormancy is: — Gibberellin
7. Which plant hormone promotes the formation of female flowers in certain species like cucumber? — Ethylene
8. Which gaseous plant hormone is most famous for accelerating fruit ripening? — Ethylene
9. The 'foolish seedling' or 'bakanae' disease of rice seedlings is caused by excessive production of which hormone? — Gibberellin
10. The process of leaf senescence (aging) is generally promoted by: — Abscisic Acid and Ethylene
11. The 'triple response' in seedlings, characterized by inhibition of stem elongation, thickening of stem, and horizontal growth, is induced by: — Ethylene
12. The pigment involved in detecting photoperiod is: — Phytochrome
13. Seed dormancy is often maintained by which plant hormone? — Abscisic Acid
14. Which hormone is synthesized in the root tips and transported upwards? — Cytokinin
15. Short-day plants are those that flower when: — Day length is shorter than a critical period
16. Long-day plants are those that flower when: — Day length is longer than a critical period
17. Which of the following is NOT a characteristic of etiolated plants? — Presence of chlorophyll
18. Which hormone is often referred to as the 'stress hormone'? — Abscisic Acid
19. Vernalization is a process by which a plant's flowering is promoted by: —
20. Day-neutral plants are plants that: — Flower irrespective of the day length
21. Gibberellins are known for their role in promoting which of the following processes? — Stem elongation and breaking dormancy
22. The phenomenon where roots grow away from light and shoots grow towards light is called: — Phototropism
23. The concentration of which hormone is high in dormant seeds and buds? — Abscisic Acid
24. Which hormone is synthesized primarily in the developing leaves and seeds? — Gibberellin
25. Which hormone is essential for the formation of vascular tissues (xylem and phloem)? — Auxin and Cytokinin
26. Which hormone plays a role in the formation of adventitious roots on stem cuttings? — Auxin
27. Which hormone is synthesized in the developing seeds and plays a role in embryo development and seed dormancy? — Abscisic Acid
28. Which plant hormone is primarily responsible for cell elongation and root formation? — Auxin
29. Which hormone promotes the formation of callus and adventitious roots in tissue culture? — Auxin
30. Which hormone is involved in stomatal closure during water stress? — Abscisic Acid
31. The phenomenon of apical dominance, where the terminal bud grows preferentially, is primarily regulated by: — Auxins
32. The term 'phytochrome' is most closely associated with the plant's ability to perceive: — Light quality and quantity
33. Abscisic Acid (ABA) is generally considered a: — Stress hormone and inhibitor of growth
34. The inhibition of lateral bud growth by the terminal bud is known as apical dominance and is primarily mediated by: — Low levels of Cytokinin and high levels of Auxin
35. Ethylene is produced in: — Developing fruits and senescing leaves
36. Photoperiodism plays a crucial role in regulating: — Flowering time
37. Vernalization is a process that ensures flowering occurs: — Only after experiencing winter conditions
38. The process of moving a plant from a cold environment to a warm environment to induce flowering is an example of: — Vernalization
39. Which of the following is NOT a function of Auxin? — Inhibits lateral bud growth
40. Auxin is synthesized in: — Root tips and developing seeds
41. The synthesis of Gibberellins occurs mainly in: — Root tips and young leaves
42. Cytokinins primarily affect cell division and differentiation in: — Meristematic tissues and differentiating tissues
43. Ethylene promotes abscission (shedding) of: — Mature leaves and flowers
44. A plant that flowers in response to a continuous night of 8 hours and a day of 16 hours would be classified as a: — Long-day plant
45. The phenomenon of flowering in plants like soybeans, which flower irrespective of the day length, indicates they are: — Day-neutral plants
46. The phenomenon of etiolation in plants grown in darkness is characterized by: — Long, weak stems, pale color, and unexpanded leaves
47. Which of the following is a critical factor in determining whether a plant is a short-day, long-day, or day-neutral plant? — Critical duration of light or darkness
48. The process of breaking seed dormancy by exposing seeds to cold temperatures is known as: — Stratification
49. Photoperiodism is the plant's response to: — Light duration
50. What is the primary role of phytochrome in photoperiodism? — To detect the duration of light and darkness
All One Line Questions
E-Book Plant growth and development - plant hormones auxin gibberellin cytokinin ethylene abscisic acid photoperiodism vernalization Online Test Plant growth and development - plant hormones auxin gibberellin cytokinin ethylene abscisic acid photoperiodism vernalization Question Bank Plant growth and development - plant hormones auxin gibberellin cytokinin ethylene abscisic acid photoperiodism vernalization