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Wednesday, February 16, 2011

MCQ botany

MCQ botany
Botany Mcq Tutorial
M.C.Q. In Botany.
1. Double fertilization was discovered by:
(a) Nawaschin
(b) Strasburger
(c) Emerson
(d) None of these
Ans. (a)
2. In photosynthesis action and absorption spectrum were related by:
(a) Von Helmont
(b) Engelmann
(c) Emerson
(d) Lavosier
Ans. (b)
3. Which one of the following doesn’t help in molecule transport?
(a) Diffusion
(b) Osmosis
(c) Surface tension
(d) Active transport
Ans. (c)
4. Stomatal opening in plants occurs due to influx of:
(a) Na
(b) K
(c) ABA
(d) Auxin
Ans. (b)
5. Energy transfer in photosynthesis occurs as:
(a) phycoerythrin ? phycocyanin?carotenoid ?chlorophyll-a
(b) chlorophyll-b ?carotenoid? phycoetythrin? chlorophyll-a
(c) phycocyanin ? phycoerytn?carotenoid ?chlorophyll-a
(d) chlorophyll-b?carotenoid? phycocyanin?chlorophyll-a
Ans. (a)
6. Litmus is obtained from:
(a) Rocella montagnei
(b) Lasallia postulata
(c) Both (a) and (b)
(d) Cladonicz crispata.
Ans. (c)
7. If a plant having yellow and round seeds was crossed with another plant having green and wrinkled seeds then F1 progeny are in the ratio:
(a) 15: 1
(b) 1:15
(c) 1: 13
(d) All yellow and round seeds
Ans. (d)
8. Commercial cork is obtained from:
(a) Flax
(b) Juglans regia
(c) Hevea brassiliansis
(d) Quercus suber
Ans. (d)
9. Tea and coffee are affected by:
(a) Phytophthora
(b) Cephaleuros
(c) Herviella
(d) Albugo Candida
Ans. (b)
10. If decomposers are removed what will happen to the ecosystem?
(a) Energy cycle is stopped
(b) Mineral cycle is stopped
(c) Consumers cannot absorb solar energy
(d) Rate of decomposition of mineral increases
Ans. (b)
11. In photosynthesis what occurs in PS-Il?
(a) It takes longer wavelength of light and e- from H2O
(b) It takes shorter wavelength of light and e- from H2O
(c) It takes longer wavelength of light and e- from NADP
(d) It takes shorter wavelength of light and e- from NADP
Ans. (b)
12. Which are sensitive to SO2 pollution?
(a) Mosses
(b) Algae
(c) Lichen
(d) Ferns
Ans. (c)
13. Though Cycas has two cotyledons, this is not included in dicot because:
(a) Naked ovule
(b) They have megaspore
(c) Appears as palm tree
(d) Has compound leaves
Ans. (a)
14. In meiosis division is:
(a) 1st reductional and lInd equational
(b) 1st equational and lInd reductional
(c) Both reductional
(d) Both educational
Ans. (a)
15. Auxin in plant means for:
(a) Cell elongation
(b) Fruit ripening
(c) Cell division
(d) Inhibit the root growth
Ans. (a)
16. The thylakoid in chloroplast are arranged as:
(a) Interconnected disc
(b) Interconnected sacs
(c) Stacked discs
(d) None of the above
Ans. (c)
17. The polidy of the pollen grain in Cyperus is:
(a) 4n
(c) 2n
(b) 3n
(d) n
Ans. (d)
18. Which of the following is used as green manure?
(a) Azolla
(b) Azczdirachta indica
(c) Crotolaria juncea
(d) Hevea brassiliarzsis
Ans. (c)
19. The non-photosynthetic, non-symbiotic N2 fixing bacteria are:
(a) Rhodobacter
(b) Spirillum
(c) Azotobacter
(d) All of these
Ans. (c)
20. In monocot roots which types of vascular bundles are found?
(a) Collateral, conjoint and closed
(b) Radial with exarch xylem
(c) Bicollateral, conjoint and closed
(d) Radial with endarch xylem
Ans. (b)
21. The modified stem of Opuntia is:
(a) Phyllode
(b) Phylloclade
(c) Cladode
(d) Stamroinode
Ans. (b)
22. Among plants “pheromones” are secreted by the cells of the following plants for given function:
(a) All plants for growth an development
(b) Yeast for facilitating mating
(c) All fungi for sexual reproduction
(d) Rhizopus for formation of zygospore
Ans. (b)
23. The gases that produce green house effect are:
(a) CH4, CFCs, CO2
(b) CO2, N2O, H2
(c) CFCs, NO2, O2
(d) CO2, N2 water vapour
Ans. (a)
24. What’s the difference between RNA and DNA?
(a) Base
(b) Sugar
(c) Sugar and base
(d) Phosphate
Ans. (c)
25. Increase in toxic concentration from one trophic level to another trophic level is called:
(a) Ecological toxification
(b) bio-magnification
(c) bioindicator
(d) Cytological effect
Ans. (b)

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