Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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1.

Bacteria, fungi, lower plants survive in adverse conditions by

  • diapause

  • suspended growth

  • migration

  • formation of thick walled spores.


D.

formation of thick walled spores.

Bacteria, fungi and lower plants survive in adverse conditions through formation of thick walled spores. Algae form resting spore or akinetes which are thick walled spores and store food material. In fungi, thick walled perennating spores called chlamydospores are formed. Bacteria form endospores which is probably the most resistant living thing known. They may remain alive in boiling water for more than 2 hours.


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2.

Cell theory was proposed by

  • a botanist

  • a zoologist

  • a botanist and a zoologist

  • a psychologist


3.

Identify the given figures A, B, C, D and E.

                 

  •        A        B        C        D        E
    Marginal Axile Free central Parietal Basal
  •        A        B        C        D        E
    Marginal Parietal Free central Axile Basal
  •        A        B        C        D        E
    Marginal Axile Parietal Free central Basal
  •        A        B        C        D        E
    Marginal Axile Parietal Basal Free central

4. Given figure shows

  • structure of lenticel

  • hydathode showing gaseous vapour exchange

  • fungus reproducing by spore formation

  • algae reproducing by spore formation.


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5.

In the given diagram A and B represent

  •              A               B
    Mineralisation Demineralisation
  •              A               B
    Ammonification Denitrification
  •              A               B
    Denitrification Ammonification
  •              A               B
    Denitrification Mineralisation

6.

In active transport, carrier proteins are used, which use energy in the form of ATP, to

  • transport molecules against concentration gradient of cell wall.

  • transport molecules along concentration gradient of cell membrane.

  • transport molecules against concentration gradient of cell membrane.

  • transport molecules along concentration gradient of cell wall.


7.

In a 50 gm living tissue, what would be the amount of water

  • 15- 25 gm

  • 25 - 30 gm

  • 35- 45 gm

  • 70- 90 gm


8.

PS-II occurs only in

  • stroma

  • granal thylakoids

  • stromal lamella

  • matrix


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9.

After glycolysis, fate of glucose in mitochondrial matrix is

  • oxidation

  • reduction

  • oxidative decarboxylation

  • hydrolysis


10.

Cleistogamy is leading over anthesis because

  • pollination agent is not required

  • it assures heterozygosity

  • it favours insect pollination

  • it allows xenogamy


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