alleryA "vector" in recombinant DNA technology serves to
ACarry alien DNA into the host cell
BAdd methyl groups to DNA
CPrevent replication of DNA
DExcise all restriction sites
Answer & Solution
Correct answer: A. Carry alien DNA into the host cell
1. A vector in cloning transports an alien DNA fragment into a host organism.
2. syllabus draws an analogy with a mosquito acting as a biological vector.
3. Plasmids and bacteriophages are common cloning vectors.
4. A good vector has an ori, selectable marker and unique cloning sites for the insert.
_Source: syllabus Biology, Ch 9 "Biotechnology: Principles and Processes", §9.1_
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