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Bihar Board Class 12 (Science) Biotechnology and its Applications — practice questions

Explore 32 free Biotechnology and its Applications questions in Bihar Board Class 12 (Science) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Biotechnology and its Applications questions and exercises with answers

Showing questions 1–30 of 32.

The ability of a single plant cell to regenerate a whole plant is called:Read the answer and worked solution →To raise virus-free plants from an infected plant, which part is cultured?Read the answer and worked solution →Which sugar serves as the carbon source in a plant tissue culture medium?Read the answer and worked solution →Pomato was produced by fusing protoplasts of which two plants?Read the answer and worked solution →Plant cells whose cell walls have been digested away are called:Read the answer and worked solution →Plants grown from fused protoplasts of two varieties are called:Read the answer and worked solution →Which of these is a biotic stress rather than an abiotic one?Read the answer and worked solution →Beetles killed by Bt toxin belong to which insect group?Read the answer and worked solution →Meloidegyne incognitia harms tobacco plants by infecting their:Read the answer and worked solution →Nematode-specific genes were put into tobacco using which vectors?Read the answer and worked solution →Apart from RNA viruses, a natural source of the dsRNA behind RNAi is:Read the answer and worked solution →In eukaryotes, RNA interference naturally serves as a method of:Read the answer and worked solution →Insulin taken from cattle and pigs caused some patients to develop:Read the answer and worked solution →The main hurdle in making human insulin by rDNA methods was:Read the answer and worked solution →How old was the girl given the first clinical gene therapy in 1990?Read the answer and worked solution →ADA deficiency is caused by which change in the ADA gene?Read the answer and worked solution →Why does ADA gene therapy need periodic infusions of engineered lymphocytes?Read the answer and worked solution →A permanent cure for ADA deficiency could come from adding the gene to:Read the answer and worked solution →Why does a clone with a mutated gene not show up on autoradiography?Read the answer and worked solution →A radioactive probe bound to its complementary DNA is detected by:Read the answer and worked solution →For toxicity testing, transgenic animals carry genes that make them:Read the answer and worked solution →Transgenic mice for polio vaccine testing could replace the use of:Read the answer and worked solution →In India, GEAC stands for:Read the answer and worked solution →Roughly how many rice varieties are estimated to exist in India?Read the answer and worked solution →Using bio-resources without authorisation or compensation is called:Read the answer and worked solution →The crtI gene used to make golden rice was taken from a:Read the answer and worked solution →In the original golden rice, the psy gene came from:Read the answer and worked solution →Golden rice transgenes are expressed only in the grain because of:Read the answer and worked solution →Bt cotton came to India in 2002 through a venture of Monsanto and:Read the answer and worked solution →Which pair of growth regulators is added to plant tissue culture medium?Read the answer and worked solution →

Worked practice questions

The ability of a single plant cell to regenerate a whole plant is called:

  1. Parthenocarpy
  2. Polyembryony
  3. Totipotency
  4. Apomixis
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Correct answer: C. Totipotency

Totipotency is the capacity of any cell or explant to give rise to a complete plant.

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To raise virus-free plants from an infected plant, which part is cultured?

  1. Leaf mesophyll
  2. Mature phloem
  3. Root cortex
  4. Apical meristem
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Correct answer: D. Apical meristem

Apical and axillary meristems stay free of virus even in an infected plant, so they yield healthy plants in vitro.

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Which sugar serves as the carbon source in a plant tissue culture medium?

  1. Starch
  2. Cellulose
  3. Glycogen
  4. Sucrose
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Correct answer: D. Sucrose

Tissue culture media supply sucrose as the carbon source along with salts, vitamins and amino acids.

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