Multiple Choice Questions

Advertisement

In the given diagram A and B represent

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


C.

             A               B
Denitrification Ammonification

In given diagram (A) represents denitrification and (B) represents ammonification. Denitrification is conversion of nitrates into nitrogen gas by some microorganisms e.g., Pseudomonas denitrificans, Thiobacillus denitrificans, Micrococcus denitrificans. Ammonification is conversion of dead remains of living organisms into ammonia with the help of microorganisms like Bacillus ramosus, B.vulgaris, B. mesentericus etc.


Advertisement

After glycolysis, fate of glucose in mitochondrial matrix is

  • oxidation

  • reduction

  • oxidative decarboxylation

  • hydrolysis


Cell theory was proposed by

  • a botanist

  • a zoologist

  • a botanist and a zoologist

  • a psychologist


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.


Given figure shows

  • structure of lenticel

  • hydathode showing gaseous vapour exchange

  • fungus reproducing by spore formation

  • algae reproducing by spore formation.


Advertisement

Bacteria, fungi, lower plants survive in adverse conditions by

  • diapause

  • suspended growth

  • migration

  • formation of thick walled spores.


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


PS-II occurs only in

  • stroma

  • granal thylakoids

  • stromal lamella

  • matrix


Cleistogamy is leading over anthesis because

  • pollination agent is not required

  • it assures heterozygosity

  • it favours insect pollination

  • it allows xenogamy


Advertisement

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