Multiple Choice Questions

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For transformation, microparticles coated with DNA to be bombarded with gene gun are made up of

  • silver or platinum

  • platinum or zinc

  • silicon or platinum

  • silicon or platinum


D.

silicon or platinum

Biolistics or gene gun is a direct or vectorless way used to introduce alien DNA into host cells. In this method of gene transfer, high velocity micro-particles of gold or tungsten, coated with DNA are bombarded on the plant cells. 

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Which one single organisms or the pair of organisms is correctly assigned to its or their named taxonomic group?

  • Paramecium and Plasmodium belong to the same kingdom as that of Penicillium.

  • Lichen is a composite organism formed from the symbiotic association of an algae and a protozoan.

  • Yeast used in making bread and beer is a fungus.

  • Yeast used in making bread and beer is a fungus.

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Even in absence of pollinating agents seed-setting is assured in 

  • Commellina

  • Zostera

  • Salvia

  • Salvia

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Yeast is used in the production of

  • citric acid and lactic acid

  • lipase and pectinase

  • bread and beer

  • bread and beer

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The upright pyramid of number is absent in

  • pond

  • forest

  • lake

  • lake

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Removal of introns and joining of exons in a defined order during transcription in called

  • looping

  • inducing

  • slicing

  • slicing

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Fgeneration in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1:2:1. It represents a case of

  • codominance

  • dihybrid cross

  • monohybrid cross with complete dominance

  • monohybrid cross with complete dominance

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A nitrogen-fixing microbe associated with Azolla in rice field is

  • Spirulina

  • Anabaena

  • Frankia

  • Frankia

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The coconut water and the edible part of coconut are equivalent to

  • endosperm

  • endocarp

  • mesocarp

  • mesocarp

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Which one of the following is an example of carrying out biological control of pests/diseases using microbes?

  • Trichoderma sp. against certain plant pathgens

  • Nucleopolyhedrovirus against white rust in Brassica

  • Bt-cotton to increase cotton yield

  • Bt-cotton to increase cotton yield

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