In genetic engineering, a DNA segment (gene) of interest, is transferred to the host cell through a vector. Consider the following four agents (A-D) in this regard and select the correct option about which one or more of these can be used as a vector/vectors?
(A) A bacterium (B) Plasmid
(C) Plasmodium (D) Bacteriophage

A), (B) and (D) only

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(A) only

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(A) and (C) only

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(B) and (D) only

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Solution

The correct option is D (B) and (D) only
Vector is a DNA molecule used as a vehicle to artificially carry foreign genetic material into another cell, where it can be replicated and expressed. A vector containing foreign DNA is termed recombinant DNA. The four major types of vectors are plasmids, viral vectors (bacteriophages), cosmids and artificial chromosomes.
so, the correct answer is '(B) and (D) only'

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