The chemical nature of kinetin is 6-furfuryl amino purine

1. Richmond – Lang effect is
(A) Morphogenesis
(B) Delay of senescence under control of cytokinin
(D) Induction of early flowering
(D) Protection of organs
Answer: (B)

2. Who repoted that cononut milk contains cytokinins
(A) Skoog
(B) Miller
(C) Steward
(D) Thiamann
Answer: (A)

3. The chemical nature of kinetin is
(A) Indole acetic acid
(B) Mesopentyl adenine
(C) 6-furfuryl amino purine
(D) CH2 = CH2
Answer: (C)

4. The ripening harmone is
(A) Auxin
(B) Ethylene
(C) GA
(D) ABA
Answer: (B)

5. The only gaseous harmone in plants is
(A) Auxin
(B) GA
(C) ABA
(D) Ethylene
Answer: (D)

6. Amino acid methionine is the precusor for
(A) Ethylene
(B) ABA
(C) GA
(D) Auxin
Answer: (A)

7. If the dark phase of a shortday plant is intrupted by a flash of light then
(A) It will Flower
(B) Will not flower
(C) produve vernalin
(D) Al of these
Answer: (B)

8. Photoperiodism is associated with synthesis of
(A) Vernalin
(B) Colchicine
(C) abscissin
(D) Florigen
Answer: (D)

9. 2,4-D is used as
(A) Florigen
(B) Vernalin
(C) Herbicide
(D) Fungicide
Answer: (C)

10. Which of the folowing hormone is polar.
(A) Ethylene
(B) ABA
(C) GA
(D) Cytokinin.
Answer: (D)

11. The type of germination in which cotyledons come above the ground is called as
(A) Epigeal
(B) Hypogeal
(C) Viviparpus
(D) Oviparous
Answer: (A)

12. In most of monocot plants, germination is
(A) Epigeal
(B) Hypogeal
(C) Viviparous
(D) Hydrogeal
Answer: (B)

13. Emergence of radicle and plumule from seed is called
(A) Pregemination
(B) Post germination
(C) Germination
(D) Dormancy
Answer: (C)

14. In stratification, dormant seeds are kept at
(A) Very high temp
(B) Low temperature(0-100C)
(C) Under aerated condition
(D) Optimum temperature
Answer: (B)

15. Longevity of seed can be prolonged by keeping them at
(A) Dry condition and low temperature
(B) Humidity and low temperature
(C) Low temperature and dryness
(D) High temperature
Answer: (B)

16. The resumption of active growth of embryo is called as
(A) Germination
(B) Growth
(C) Quiescence
(D) Viability
Answer: (A)

17. Longevity of seeds of lotus is
(A) 1year
(B) 10 years
(C) 100 years
(D) 1000 years
Answer: (D)

18. Innate seed dormancy is
(A) Caused due to internal factors
(B) Different from quiescence
(C) Called primary dormancy
(D) All the above
Answer: (D)

19. A seed which is just waiting for favourable environmental condition to germinate is called
(A) Dormant seed
(B) Quiescent seed
(C) Non-viable seed
(D) Dead seed
Answer: (B)

20. Seed are subjected to hydraulic pressure at 2000 atm. To
(A) Increase permeability of seed coat to water
(B) Break seed coat
(C) Completion of after ripening period
(D) Leach out the germination inhibitors
Answer: (A)