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AP Intermediate 2nd Year Biotechnology and Applications — practice questions — page 6

Explore 167 free Biotechnology and Applications questions in AP Intermediate 2nd Year 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 151–167 of 167.

Restriction enzymes are popularly called:Read the answer and worked solution →Which enzyme is used to open plant cells before DNA isolation?Read the answer and worked solution →Purified DNA finally precipitates out on adding chilled:Read the answer and worked solution →Separation and purification of the final product is called:Read the answer and worked solution →The three sequential steps of one PCR cycle are:Read the answer and worked solution →Taq DNA polymerase used in PCR is obtained from:Read the answer and worked solution →Hind II cuts DNA on recognising a specific sequence of:Read the answer and worked solution →PCR is now used routinely to detect which virus?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 →The genes cryIAc and cryIIAb protect cotton against:Read the answer and worked solution →Bt cotton is resistant to BOLLWORM pests because it carries a gene from:Read the answer and worked solution →Which enzyme joins two cut DNA ends to make recombinant DNA?Read the answer and worked solution →The power of any plant cell to grow into a whole plant is:Read the answer and worked solution →In recombinant DNA technology, plasmids are commonly used as:Read the answer and worked solution →

Worked practice questions

Restriction enzymes are popularly called:

  1. Molecular anchors
  2. Molecular scissors
  3. Molecular staples
  4. Molecular ladders
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Correct answer: B. Molecular scissors

1. Cutting DNA at chosen places was the missing step. 2. Restriction enzymes supplied exactly that cut. 3. Hence the nickname molecular scissors. _Source: syllabus Biology, Ch 9 'Biotechnology : Principles and Processes'_

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Which enzyme is used to open plant cells before DNA isolation?

  1. Protease
  2. Cellulase
  3. Lysozyme
  4. Chitinase
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Correct answer: B. Cellulase

1. The wall must be digested to release the DNA. 2. Plant walls are built of cellulose. 3. Cellulase is therefore the enzyme used. _Source: syllabus Biology, Ch 9 'Biotechnology : Principles and Processes'_

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Purified DNA finally precipitates out on adding chilled:

  1. Benzene
  2. Toluene
  3. Ethanol
  4. Acetone
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Correct answer: C. Ethanol

1. Proteins and RNA are stripped away first. 2. Chilled ethanol is then poured over the extract. 3. DNA appears as fine threads in the suspension. _Source: syllabus Biology, Ch 9 'Biotechnology : Principles and Processes'_

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More Biology topics

Genetics and EvolutionReproduction in Organisms & PlantsBiology in Human Welfare & HealthEcology and EnvironmentReproductive HealthOrganisms and PopulationsBiodiversity and ConservationEvolution