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Principles Of Inheritance And Variation

Question

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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 the 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

A only

A and C only

B and D only

Solution

D.

B and D only

Plasmids are the extrachromosomal DNA found in bacterial cells. These are commonly used as vectors in genetic engineering programmes because these have the capacity of binding with eukaryotic DNA.
A bacteriophage is a virus that is parasitic within a bacterium. These also, are the important tools in genetic engineering as cloning vectors.

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