Question:
Two enzymes responsible for restricting the growth of bacteriophage were isolated from
Two enzymes responsible for restricting the growth of bacteriophage were isolated from
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Restriction enzymes = bacterial defense against phages.
Updated On: Jul 18, 2026
- Salmonella
- Agrobacterium
- Escherichia coli
- Archaea bacteria
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Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding restriction enzymes.
Restriction enzymes are molecular scissors that cut DNA at specific sequences. They form part of bacterial defense mechanisms against bacteriophages.
Step 2: Host defense system.
Bacteria protect themselves from viral DNA using restriction-modification systems. These enzymes restrict phage replication by cutting foreign DNA.
Step 3: Discovery source.
The first restriction enzymes were discovered in Escherichia coli and Haemophilus influenzae. These enzymes became foundational tools in genetic engineering.
Step 4: Function mechanism.
Restriction enzymes recognize specific palindromic sequences and cleave DNA, preventing viral replication inside the host cell.
Step 5: Biological significance.
These enzymes are widely used in recombinant DNA technology and molecular cloning.
Step 6: Final conclusion.
Thus, restriction enzymes were isolated from Escherichia coli.
Restriction enzymes are molecular scissors that cut DNA at specific sequences. They form part of bacterial defense mechanisms against bacteriophages.
Step 2: Host defense system.
Bacteria protect themselves from viral DNA using restriction-modification systems. These enzymes restrict phage replication by cutting foreign DNA.
Step 3: Discovery source.
The first restriction enzymes were discovered in Escherichia coli and Haemophilus influenzae. These enzymes became foundational tools in genetic engineering.
Step 4: Function mechanism.
Restriction enzymes recognize specific palindromic sequences and cleave DNA, preventing viral replication inside the host cell.
Step 5: Biological significance.
These enzymes are widely used in recombinant DNA technology and molecular cloning.
Step 6: Final conclusion.
Thus, restriction enzymes were isolated from Escherichia coli.
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