Question

Chromosomes in a bacterial cell can be $1-3$ in number and

• A. are always circular
• B. are always linear
• C. can be either circular or linear, but never both within the same cell
• D. can be circular as well as linear within the same cell

Answer 1

Answer: (A)

Chromosomes in a bacterial cell can be $1-3$ in number and are always circular. The nucleoid of bacteria consists of a single, large DNA double helix which is circular in several bacteria. In addition to the circular DNA chromosome, a small amount of subsidise extra chromosomal DNA is also present known as plasmids or episomes.