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CUET UG Biotechnology and Applications — practice questions — page 2

Explore 112 free Biotechnology and Applications questions in CUET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Biotechnology and Applications questions and exercises with answers

Showing questions 31–60 of 112.

Plant cells stripped of their walls by digestion are called:Read the answer and worked solution →Fusing protoplasts of two varieties gives a plant known as a:Read the answer and worked solution →Rice enriched with vitamin A by genetic modification is:Read the answer and worked solution →The Bt toxin used in pest resistant crops comes from a:Read the answer and worked solution →Inside Bacillus thuringiensis the Bt toxin is stored as:Read the answer and worked solution →The Bt protoxin becomes an active toxin because the insect gut is:Read the answer and worked solution →Once activated the Bt toxin kills by acting on the insect:Read the answer and worked solution →The genes cryIAc and cryIIAb protect cotton against:Read the answer and worked solution →Tobacco roots are protected from a nematode by silencing its:Read the answer and worked solution →Silencing a gene with a complementary double stranded RNA is:Read the answer and worked solution →Human insulin is built from two polypeptide chains joined by:Read the answer and worked solution →The extra stretch removed as pro-insulin matures is the:Read the answer and worked solution →Human insulin was first produced by recombinant means in:Read the answer and worked solution →Inserting a normal gene to correct an inherited defect is:Read the answer and worked solution →The first clinical gene therapy treated a deficiency of:Read the answer and worked solution →The ADA gene is carried into a patient's lymphocytes by a:Read the answer and worked solution →Very low numbers of a pathogen can be detected early by:Read the answer and worked solution →PCR is now used routinely to detect which virus?Read the answer and worked solution →ELISA works on the principle of interaction between:Read the answer and worked solution →In molecular diagnosis the labelled single strand used is called a:Read the answer and worked solution →Most transgenic animals produced so far have been:Read the answer and worked solution →Rosie, the first transgenic cow, gave milk enriched in human:Read the answer and worked solution →Transgenic mice are being used to test the safety of the:Read the answer and worked solution →Which body clears the safety of GM organisms in India?Read the answer and worked solution →Using a country's bio-resources without authorisation is:Read the answer and worked solution →How many documented varieties of Basmati are grown in India?Read the answer and worked solution →Colonies whose beta galactosidase gene carries an insert appear:Read the answer and worked solution →Bacterial cells are made competent by treating them with a divalent:Read the answer and worked solution →Bombarding plant cells with DNA coated gold particles is called:Read the answer and worked solution →Micro-injection puts recombinant DNA directly into the:Read the answer and worked solution →

Worked practice questions

Plant cells stripped of their walls by digestion are called:

  1. Amyloplasts
  2. Leucoplasts
  3. Protoplasts
  4. Chloroplasts
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Correct answer: C. Protoplasts

1. Single cells are first isolated from the plant. 2. Their cell walls are then digested away. 3. The naked cells left behind are protoplasts. _Source: syllabus Biology, Ch 10 'Biotechnology and its Applications'_

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Fusing protoplasts of two varieties gives a plant known as a:

  1. Genetic mutant
  2. Natural clone
  3. Sterile diploid
  4. Somatic hybrid
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Correct answer: D. Somatic hybrid

1. Two protoplasts, each with a wanted trait, are fused. 2. The fused cell is grown into a whole plant. 3. Such a plant is called a somatic hybrid. _Source: syllabus Biology, Ch 10 'Biotechnology and its Applications'_

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Rice enriched with vitamin A by genetic modification is:

  1. Golden rice
  2. Bt cotton
  3. Bt brinjal
  4. Basmati rice
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Correct answer: A. Golden rice

1. Genetic modification can raise nutritional value. 2. One example given is vitamin A enriched rice. 3. That variety is called golden rice. _Source: syllabus Biology, Ch 10 'Biotechnology and its Applications'_

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