Question

The enzyme coded by E. coli plasmid ___________.

• A. Allows E.coli to grow in the presence of tetracycline
• B. Digest the nutrient media
• C. Causes the cells to autolyze
• D. Makes this E.coli strain virulent
• E. None of the above

Answer 1

Answer: (A)

Allows E.coli to grow in the presence of tetracycline

E.coli plasmid is a extrachromosomal DNA present in the cells that provides it drug antibiotic resistance. Tetracycline is a antibiotics whose plasmid contains drug resistance gene thus E.coli easily grow in tetracycline medium.

So the correct answer is "Allows E. coli to grow in presence of tetracycline".