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Haryana Board Class 12 (HBSE) Biotechnology Principles and Processes — practice questions

Explore 30 free Biotechnology Principles and Processes questions in Haryana Board Class 12 (HBSE) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Biotechnology Principles and Processes questions and exercises with answers

Showing questions 1–30 of 30.

Enzymes that cut DNA at specific sequences and are called molecular scissors are:Read the answer and worked solution →The enzyme that joins two DNA fragments end to end is DNA:Read the answer and worked solution →A small circular DNA that carries an alien gene into a host cell is called a:Read the answer and worked solution →DNA made by joining pieces from two different sources is called:Read the answer and worked solution →A vector must carry a sequence where copying begins, called the origin of:Read the answer and worked solution →The bacterium used as the host for the first cloned antibiotic resistance gene was:Read the answer and worked solution →The number of restriction enzymes now isolated is more than:Read the answer and worked solution →In the name EcoRI, the letters Eco come from the name of the:Read the answer and worked solution →Restriction endonucleases recognise DNA sequences that read the same on both strands, called:Read the answer and worked solution →Fragments cut by the same restriction enzyme can be joined because they carry matching:Read the answer and worked solution →DNA fragments of different sizes are separated by the technique of:Read the answer and worked solution →The matrix most commonly used for separating DNA fragments is:Read the answer and worked solution →In gel electrophoresis, the fragment that travels farthest through the gel is the:Read the answer and worked solution →Separated DNA bands are made visible by staining the gel with:Read the answer and worked solution →Before taking up foreign DNA, bacterial cells must first be made:Read the answer and worked solution →Treating bacteria with a divalent cation to help DNA enter uses:Read the answer and worked solution →After incubation on ice, competent cells are briefly placed at 42 degrees. This step is called:Read the answer and worked solution →Directly injecting recombinant DNA into the nucleus of an animal cell is called:Read the answer and worked solution →Firing gold particles coated with DNA into plant cells is known as biolistics or the:Read the answer and worked solution →PCR stands for Polymerase Chain:Read the answer and worked solution →The three repeated steps of PCR are denaturation, extension and:Read the answer and worked solution →Large scale production of a biotechnology product needs vessels known as:Read the answer and worked solution →Catch the rDNA toolsRead the answer and worked solution →Pop the PCR stepsRead the answer and worked solution →Run the biotech gatesRead the answer and worked solution →Slice the biotech termsRead the answer and worked solution →Cutting or joiningRead the answer and worked solution →Sort the biotech stepsRead the answer and worked solution →Type the numberRead the answer and worked solution →Biotechnology bingoRead the answer and worked solution →

Worked practice questions

Enzymes that cut DNA at specific sequences and are called molecular scissors are:

  1. Restriction enzymes
  2. Respiration enzymes
  3. Replication enzymes
  4. Regulation enzymes
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Correct answer: A. Restriction enzymes

1. Genetic engineering needs DNA cut at exact places. 2. One class of enzymes does this cutting. 3. They are the restriction enzymes. _Source: syllabus Biology Class XII, Chapter 11, Biotechnology Principles and Processes._

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The enzyme that joins two DNA fragments end to end is DNA:

  1. Laccase
  2. Ligase
  3. Lipase
  4. Lactase
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Correct answer: B. Ligase

1. After cutting, the pieces must be sealed together. 2. One enzyme forms that bond. 3. It is DNA ligase. _Source: syllabus Biology Class XII, Chapter 11, Biotechnology Principles and Processes._

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A small circular DNA that carries an alien gene into a host cell is called a:

  1. Vector
  2. Vesicle
  3. Vacuole
  4. Ventricle
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Correct answer: A. Vector

1. Plasmids carry foreign DNA the way a mosquito carries a parasite. 2. That carrier role has a name. 3. It is a vector. _Source: syllabus Biology Class XII, Chapter 11, Biotechnology Principles and Processes._

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