STANDARDZoology-Biotechnology
STANDARD Zoology Enzymes in Genetic Engineering MCQ Question
Type: MCQ-conceptual-Medium
In 1963, the _______ enzymes responsible for restricting the growth of bacteriophage in Escherichia coli were isolated.
A
Restriction endonuclease
B
Enzyme adding methyl groups to DNA
C
Antibiotic resistance gene
D
Both (1) and (2)
Correct Answer
Option D
Detailed Explanation
Restriction endonucleases and enzymes adding methyl groups to DNA were both involved in restricting bacteriophage growth. The former cuts DNA at specific sites, while the latter protects host DNA by methylation.
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