Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Circular chromosomes are a type of chromosome, typically found in prokaryotes like bacteria, where the DNA molecule is circular or ring-shaped rather than linear.
Related terms
Prokaryote: A unicellular organism that lacks a nucleus and other membrane-bound organelles. Prokaryotes have circular chromosomes.
A small, circular piece of DNA located in the cytoplasm of many bacteria. Plasmids are separate from the bacterial chromosome and can replicate independently.
Nucleoid: The irregularly shaped region within a prokaryotic cell where the genetic material (circular chromosome) is located.