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Questions and Answers
Which class of enzymes do restriction enzymes belong to?
Which class of enzymes do restriction enzymes belong to?
- Transferases
- Oxidoreductases
- Endonucleases (correct)
- Hydrolases
What is the function of a modification enzyme (methyltransferase) in a prokaryote?
What is the function of a modification enzyme (methyltransferase) in a prokaryote?
- It protects host DNA (correct)
- It degrades foreign DNA
- It cleaves DNA at specific sites
- It promotes viral invasion
How many incisions do restriction enzymes make to cut DNA?
How many incisions do restriction enzymes make to cut DNA?
- Two incisions (correct)
- One incision
- Three incisions
- No incisions
Where are restriction enzymes found?
Where are restriction enzymes found?
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What is the main function of restriction enzymes in a prokaryote?
What is the main function of restriction enzymes in a prokaryote?
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Study Notes
Restriction Enzymes
- Restriction enzymes belong to the class of endonucleases.
- Modification enzymes, also known as methyltransferases, add a methyl group to the DNA, protecting it from restriction enzymes in prokaryotes.
- Restriction enzymes make double-stranded incisions, creating a staggered cut with 5' overhangs, 3' overhangs, or blunt ends, to cut DNA.
- Restriction enzymes are found in prokaryotes, such as bacteria, where they act as a defense mechanism against foreign DNA.
- The main function of restriction enzymes in a prokaryote is to protect the cell from viral infections by cleaving foreign DNA, thereby preventing viral replication.
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Description
Test your knowledge of restriction enzymes and their classification in this quiz. Explore the different types and structures of these important DNA-cleaving enzymes.
