Question

In genetic engineering, a DNA segment (gene) of interest is transferred to the host cell through a vector. Consider the following four agents in this regard and select the correct option about which one or more of these can be used as a vector/vectors?
(i) Bacterium
(ii) Plasmid
(iii) Plasmodium
(iv) Cosmids

(v) Enzyme

• A. (ii) and (iv) only
• B. (i) and (ii) only
• C. (i), (iii) and (iv)
• D. (iv) only

Answer 1

The correct option is A (ii) and (iv) only

In molecular cloning, a vector is a DNA molecule used as a transport 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, cosmids, and artificial chromosomes.

Therefore, the correct answer is option A.