MCQ Questions on Plant Growth And Development
1. Coconut milk contains a cytokinin called ____ which promotes plant growth.
(a) Naphthalene acetic acid
(b) Indole-3-acetic acid
(c) Gelatin
(d) Zeatin
Answer
Answer: (d) Zeatin
2. One of the following is not an auxin
(a) Indole-3-acetic acid
(b) Malic Hydrazide
(c) Indole butyric acid
(d) Naphthalene acetic acid
Answer
Answer: (b) Malic Hydrazide
3. _________can stimulate the germination of barley seeds
(a) α-amylase
(b) Abscisic acid
(c) Benzoic acid
(d) Coumarin
Answer
Answer: (a) α-amylase
4. Seed dormancy is triggered by
(a) Indole-3-ethanol
(b) Abscisic acid
(c) Carbon dioxide
(d) None of the above
Answer
Answer: (b) Abscisic acid
5. The significance of the day length in plants was first shown in:
(a) Barley
(b) Lettuce
(c) Tobacco
(d) Tomato
Answer
Answer: (c) Tobacco
6. Uneven distribution of auxins may lead to
(a) Phototrophic curvature
(b) Day-neutral curvature
(c) Both (1) and (2)
(d) None of the above
Answer
Answer: (a) Phototrophic curvature
7. Tendrils of garden peas coiling around any support signifies:
(a) Seismonasty
(b) Thigmotaxis
(c) Gravitropism
(d) Thigmotrophism
Answer
Answer: (d) Thigmotrophism
8. ____________ tissues synthesize natural cytokinins
(a) Old
(b) Rapidly dividing
(c) Storage
(d) None of the above
Answer
Answer: (b) Rapidly dividing
9. ________ is a plant hormone generally present in the gaseous state
(a) Ethylene
(b) Ethane
(c) Argon
(d) None of the above
Answer
Answer: (a) Ethylene
10. _________ is a colourless gas that serves as a signalling hormone.
(a) Benzene
(b) Nitric Oxide
(c) Ozone
(d) None of the above
Answer
Answer: (b) Nitric Oxide