Multiple Choice Questions

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Acid rain is caused by

  • NO2

  • SO2 and NO2

  • SO3

  • CO2


B.

SO2 and NO2

Burning of fossil fuel mainly produce SO2 and NO2, which react with water to form sulphuric acid and nitric acid respectively. The acids when precipitated as rain or snow create acid rain.


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Which of the following is related to humoral immunity?

  • T- lymphocyte

  • B- lymphocyte

  • I- lymphocyte

  • P- lymphocyte


The scientific name of the moth which produce tasar is

  • Bombyx mori

  • Antherae mylitta

  • Antherae assamensi

  • Philosomia ricini


Ovule integument gets transformed into

  • seed

  • fruit wall

  • seed coat

  • cotyledons


Pieces of plant tissue used in culture is called

  • explant

  • domaclone

  • inoculant

  • clone


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Biolistic technique is used in

  • tissue culture process

  • gene transfer process

  • hybridization process

  • germplasm conservation process


Structural element of chromatin is

  • histone

  • acid protein and DNA

  • nuclear matrix

  • nucleosomes


The name of the pace maker of the heart is

  • lymph node

  • SA node

  • juxtaglomerular apparatus

  • semilunar valve


Fertilization occur in

  • uterus

  • ureter

  • vagina

  • fallopian tube


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Polyploid derived from two different species is called

  • autopolyploid

  • triploid

  • allopolyploid

  • monoploid