Class XII · Biology practice

Biotechnology Principles and Processes MCQs

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535 questions in this collection · Page 8 of 54

Question 71 of 535

📘 CLASS XII

Biotechnology Principles And Processes

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

Biotechnology Principles And Processes

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

Biotechnology Principles And Processes

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

Biotechnology Principles And Processes

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

Biotechnology Principles And Processes

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

Biotechnology Principles And Processes

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

Biotechnology Principles And Processes

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

Biotechnology Principles And Processes

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

Biotechnology Principles And Processes

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

Biotechnology Principles And Processes

Proteins can be removed from the DNA preparation by treatment with the enzyme _________.

Proteins are removed by treatment with protease.

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