Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

31.

Which one of the following does'nt help in molecule transport?

  • Diffusion

  • Osmosis

  • Surface tension

  • Active transport


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32.

Stomatal opening in plants occurs due to influx of

  • Na

  • K

  • ABA

  • Auxins


B.

K

Opening of stomata is an energy consuming process whereas closing of stomata is not. The turgidity of guard cells is usually controlled by K+, Cl- and H+. The opening of stomata is initiated by excretion of H+ by guard cells, intake of K+ and Cl- and closing is controlled by abscisic acid.


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33.

Energy transfer in photosynthesis occurs as

  • Phycoerythrin Phycocyanin Carotenoid Chlorophyll a

  • Chlorophyll b Carotenoid Phycoerythrin Chlorophyll a

  • Phycocyanin Phycoerythrin Carotenoid Chlorophyll a

  • Chlorophyll b Carotenoid Phycocyanin Chlorophyll a


34.

Litmus is obtained from

  • Rocella montagnei

  • Lasallia postulata

  • Both (a) and (b)

  • Cladonia crispata


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35.

Commercial cork is obtained from

  • Flax

  • Juglans regia

  • Hevea brassiliansis

  • Quercus suber


36.

Tea and coffee are affected by

  • Phytophthora

  • Cephaleuros

  • Herviella

  • Albugo candida


37.

In photosynthesis what occurs in PS-II?

  • It takes longer wavelength of light and e- from H2O

  • It takes shorter wavelength of light and e- from H2O

  • It takes longer wavelength of light and e- from NADP

  • It takes shorter wavelength of light and e- from NADP


38.

Which are sensitive to SO2 pollution?

  • Mosses

  • Algae

  • Lichen

  • Ferns


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39.

Though Cycas has 2 cotyledons, this is not included in dicot because

  • naked ovule

  • they have megaspore

  • appears as palm tree

  • has compound leaves


40.

In meiosis division is

  • Ist reductional and IInd equational

  • Ist equational and IInd reductional

  • both reductional

  • both equational


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