THE MOLECULAR BASIS OF INHERITANCE
RECOMBINANT DNA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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always contains an origin of replication
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usually contains a gene that confers antibiotic resistance to the bacterial host
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always contains DNA segments for the regulation of mRNA production
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all of the above
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Detailed explanation-1: -What is an expression vector? It is a plasmid or virus that is specially designed for expressing genes in a cell. It is a vector widely used for protein production. They have basic features of a vector like ori (origin of replication), insertion site, a selectable marker, etc.
Detailed explanation-2: -An example of expression vector is the plasmid used to produce insulin important for treating diseases such as diabetes. Another example is the expression vector that introduces specific genes necessary for the synthesis of beta-carotene into the cells of rice plants, giving rise to a new variety called golden rice.
Detailed explanation-3: -Plasmid vector pBR322 is a well-established multipurpose cloning vector in laboratories worldwide, and a large number of derivatives have been created for specific applications and research purposes, including gene expression in its natural host, E. coli, and few other bacteria.
Detailed explanation-4: -An expression vector is generally a plasmid that is used to introduce a specific gene into a target cell.