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Biotechnology Principles and Processes MCQs
Class XII Biology
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NCERT Based
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NEET Practice
📘 Concept Based
📝 Exam Level
🤖 AI Explanations
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535 questions in this chapter
Question 71 of 535
📘 CLASS XII
To make bacterial cells competent to take up DNA, they are treated with a specific concentration of a _________ cation, such as calcium.
Treatment is done with a divalent cation, such as calcium.
Question 72 of 535
📘 CLASS XII
The heat shock step in making competent cells involves briefly placing them at _________.
Cells are briefly placed at 42°C (heat shock).
Question 73 of 535
📘 CLASS XII
In the method known as _________, recombinant DNA is directly injected into the nucleus of an animal cell.
Micro-injection involves direct injection into the nucleus of an animal cell.
Question 74 of 535
📘 CLASS XII
The method suitable for plants where cells are bombarded with high velocity micro-particles of gold or tungsten coated with DNA is known as _________.
This technique is known as biolistics or gene gun.
Question 75 of 535
📘 CLASS XII
Recombinant DNA technology involves several steps, the first of which is the isolation of _________.
The process starts with the isolation of DNA.
Question 76 of 535
📘 CLASS XII
To break open bacterial cells to release DNA and other macromolecules, the enzyme _________ is used.
Lysozyme is used to treat bacterial cells.
Question 77 of 535
📘 CLASS XII
To break open plant cells to release DNA and other macromolecules, the enzyme _________ is used.
Cellulase is used to treat plant cells.
Question 78 of 535
📘 CLASS XII
To break open fungal cells to release DNA and other macromolecules, the enzyme _________ is used.
Chitinase is used to treat fungal cells.
Question 79 of 535
📘 CLASS XII
RNA can be removed from the DNA preparation by treatment with the enzyme _________.
RNA is removed by treatment with ribonuclease.
Question 80 of 535
📘 CLASS XII
Proteins can be removed from the DNA preparation by treatment with the enzyme _________.
Proteins are removed by treatment with protease.
