In genetic engineering, the antibiotics are used

Options

A. As selectable markers
B. To select healthy vectors
C. As sequences from where replication starts
D. To keep the cultures free of infection

Answer

A

Explanation

Some antibiotics genes are carried by the plasmids that are responsible for a useful characteristic displayed by host bacterium. These are called selectable markers. They help in identifying and selectively permitting growth of the desired transformant