Question

Which o f the following are considered as useful selectable markers for E.coli?
$a$. Ampicillin resistance gene
$b$. Chloramphenicol resistance gene
$c$. Tetracycline resistance gene
$d$. Kanamycin resistance gene

• A. $a$ only
• B. $a$ and $b$
• C. $a, b$ and $c$
• D. $a, b, c$ and $d$

Answer 1

Answer: (D)

Ampicillin resistance gene, chloramphenicol resistance gene, tetracycline resistance gene and kanamycin resistance gene are considered as useful selectable markers for E.coli.