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The bacterium Bacillus thuringiensis is widely used in contemporary biology as a/an

  • Indicator of water pollution

  • insecticide

  • agent for the production of dairy products

  • agent for the production of dairy products


B.

insecticide

Bacillus thuringiensis is Gram-positive, soil dwelling bacterium also occurs naturally in the gut of caterpillars of various types of moths and butterflies.

During sporulation, B. thuringiensis forms crystals of proteinaceous insecticidal

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Which one of the following condition in humans is correctly matched with tis chromosomal abnormality /linkage?

  • Klinefelter's syndrom-44 autosomes + XXX

  • Colourblindness- Y-linked

  • Erythroblastosis foetails - X-linked

  • Erythroblastosis foetails - X-linked


Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character.

  • The female parent is heterozygous

  • The parents could not have a had a normal daughter for this character

  • The trait under study could not be colour blindness

  • The trait under study could not be colour blindness


Which one of the following is commonly used in the transfer of foreign DNA into crops plants?

  • Trichoderma hazianum

  • Meloidogyne incognita

  • Agrobacterium tumefaciens

  • Agrobacterium tumefaciens


Point mutation involves

  • insertion

  • change in the single base pair

  • duplication

  • duplication


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