Plant physiology multiple choice questions answer key
| S.N. | Name of quiz | Test number |
|---|---|---|
| (01). | PGR MCQ: Plant Growth Regulators (Phytohormones) | 01 |
| (02). |
(01). PGR MCQ: Plant Growth Regulators (Phytohormones)
| 1. | d | 6. | c |
| 2. | c | 7. | d |
| 3. | a | 8. | a |
| 4. | d | 9. | a |
| 5. | d | 10. | b |
| 11. | b | 16. | a |
| 12. | c | 17. | a |
| 13. | b | 18. | d |
| 14. | c | 19. | c |
| 15. | d | 20. | a |
| 21. | c | 22. | d | 23. | d | 24. | b | 25. | a |
This page includes multiple choice objective questions from the main subject plant physiology. We will update this page whenever a new post is available.
- d. 2. c. 3. a. 4. d. 5. d.
- c. 7. d. 8. a. 9. a. 10. b.
- b. 12. c. 13. b. 14. c. 15. d.
- a. 17. a. 18. d. 19. c. 20. a.
- c. 22. d. 23. d. 24. b. 25. a
Explanations:
PGR MCQ: Plant Growth Regulators (Phytohormones)
PGR: Plant Growth Regulators. It is also known as Plant Hormones. Auxin, cytokinin, gibberllin, etc., are growth hormones. ABA is a growth retardant hormone.
Avena Curvature Test: Avena Curvature Test or ACT is a bioassay. It is related to auxin. It measures the angle of curvature of a decapitated coleoptile.
2, 4-D: 2, 4-D belongs to auxin. It is used as a herbicide to kill broad-leaves weeds. It acts as plant growth regulator at low concentrations.
Apical dominance: In apical dominance, the growth of terminal portion is dominated by the plant growth regulator auxin.
Seed dormancy: Some seeds require dormancy for a certain period of time. Germination won’t take place during dormancy. Gibberllin is a strong and most used plant growth regulator to break the dormancy of seeds.
ABA: ABA or Abscisic acid is an anti plant growth regulator. It supress the growth and development of a plant. We can use it to develop a bonsai.