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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 31 of 535
📘 CLASS XII
Hind II always cut DNA molecules by recognising a specific sequence of _________ base pairs.
Hind II recognizes a specific sequence of six base pairs.
Question 32 of 535
📘 CLASS XII
We know more than _________ restriction enzymes isolated from over 230 strains of bacteria today.
More than 900 restriction enzymes have been isolated from over 230 strains of bacteria.
Question 33 of 535
📘 CLASS XII
In the convention for naming restriction enzymes (e.g., EcoRI), the first letter comes from the _________ of the prokaryotic cell.
The first letter comes from the genus (E from Escherichia).
Question 34 of 535
📘 CLASS XII
In the convention for naming restriction enzymes (e.g., EcoRI), the second two letters come from the _________ of the prokaryotic cell.
The second two letters come from the species (co from coli).
Question 35 of 535
📘 CLASS XII
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 36 of 535
📘 CLASS XII
The Roman numbers following the names of restriction enzymes indicate the _________ in which the enzymes were isolated from that strain of bacteria.
Roman numbers indicate the order in which the enzymes were isolated from that strain.
Question 37 of 535
📘 CLASS XII
Restriction enzymes belong to a larger class of enzymes called _________.
Restriction enzymes belong to the larger class of enzymes called nucleases.
Question 38 of 535
📘 CLASS XII
Enzymes that remove nucleotides from the ends of the DNA are known as _________.
Exonucleases remove nucleotides from the ends of the DNA.
Question 39 of 535
📘 CLASS XII
Enzymes that make cuts at specific positions within the DNA are known as _________.
Endonucleases make cuts at specific positions within the DNA.
Question 40 of 535
📘 CLASS XII
A restriction endonuclease cuts each of the two strands of the double helix at specific points in their _________ backbones.
The cut occurs at specific points in the sugar-phosphate backbones.
