Class XII · Biology practice

Biotechnology Principles and Processes MCQs

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535 questions in this collection · Page 21 of 54

Question 201 of 535

📘 CLASS XII

Biotechnology Principles And Processes

The enzyme that cuts DNA, isolated in 1963, was called a restriction:

The enzyme that cut DNA was called restriction endonuclease.

Question 202 of 535

📘 CLASS XII

Biotechnology Principles And Processes

The first restriction endonuclease whose functioning depended on a specific DNA nucleotide sequence, isolated and characterized in 1968, was:

Hind II was the first restriction endonuclease characterized to depend on a specific DNA sequence.

Question 203 of 535

📘 CLASS XII

Biotechnology Principles And Processes

Hind II always cut DNA molecules by recognising a specific sequence of how many base pairs?

Hind II recognizes a specific sequence of six base pairs.

Question 204 of 535

📘 CLASS XII

Biotechnology Principles And Processes

How many restriction enzymes have been isolated from over 230 strains of bacteria today?

We know more than 900 restriction enzymes that have been isolated from over 230 strains of bacteria.

Question 205 of 535

📘 CLASS XII

Biotechnology Principles And Processes

In the convention for naming restriction enzymes (e.g., *EcoRI*), the first letter comes from the:

The first letter comes from the genus (E from Escherichia).

Question 206 of 535

📘 CLASS XII

Biotechnology Principles And Processes

In the convention for naming restriction enzymes (e.g., *EcoRI*), the second two letters come from the:

The second two letters come from the species (co from coli).

Question 207 of 535

📘 CLASS XII

Biotechnology Principles And Processes

In the restriction enzyme name *EcoRI*, the letter ‘R’ is derived from the name of the bacterial:

The letter ‘R’ is derived from the name of the strain (RY 13).

Question 208 of 535

📘 CLASS XII

Biotechnology Principles And Processes

The Roman numbers following the names of restriction enzymes indicate the:

Roman numbers indicate the order in which the enzymes were isolated from that strain of bacteria.

Question 209 of 535

📘 CLASS XII

Biotechnology Principles And Processes

Restriction enzymes belong to a larger class of enzymes called:

Restriction enzymes belong to the larger class of enzymes called nucleases.

Question 210 of 535

📘 CLASS XII

Biotechnology Principles And Processes

Exonucleases function by removing nucleotides from:

Exonucleases remove nucleotides from the ends of the DNA.

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