Which of the following antibiotics can be used as the selectable markers for E.coli?

All of these

a-Tetracycline

b-Ampicillin

c-Kanamycin

d-All of these is the correct option .

The genes encoding resistance to antibiotics like ampicillin, tetracycline, chloramphenicol and kanamycin are selectable markers in E. coli.

All of these antibiotics can be used as selectable markers for E. coli. E. coli cells that have taken up a recombinant plasmid containing a gene for antibiotic resistance will survive and grow in the presence of the corresponding antibiotic. So, if the gene of interest is successfully inserted into the plasmid containing resistance gene (selectable marker), the transformed E. coli cells will be able to resist the antibiotic and survive.