Question

Which of the following serves as an example of selectable markers commonly found in plasmid vectors like pBR322?

Options

• Ampicillin resistance and tetracycline resistance genes

• Restriction endonucleases EcoRI and HindIII genes

• Beta-galactosidase and DNA ligase genes

• Origin of replication (\(ori\)) and \(rop\) sequences

Answer 1

Antibiotic resistance genes, such as ampicillin resistance and tetracycline resistance genes, serve as selectable markers to identify transformants.