Where is DNA located in prokaryotic cells?

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Prepare for the Amgen Biotech Experience Lab Test. Study with detailed flashcards and comprehensive multiple-choice questions. Each snippet holds hints and clear explanations to support your understanding. Be ready for your ABE exam challenge!

Multiple Choice

Where is DNA located in prokaryotic cells?

Explanation:
In prokaryotic cells, DNA lives in the cytoplasm in a region called the nucleoid, where the single circular chromosome is concentrated. Many prokaryotes also carry small circular DNA molecules called plasmids that encode additional traits. They lack a membrane-bound nucleus, as well as mitochondria and chloroplasts, so there isn’t an organelle-based compartment for DNA. This arrangement lets the genetic material be instantly accessible for transcription and replication in the cytoplasm.

In prokaryotic cells, DNA lives in the cytoplasm in a region called the nucleoid, where the single circular chromosome is concentrated. Many prokaryotes also carry small circular DNA molecules called plasmids that encode additional traits. They lack a membrane-bound nucleus, as well as mitochondria and chloroplasts, so there isn’t an organelle-based compartment for DNA. This arrangement lets the genetic material be instantly accessible for transcription and replication in the cytoplasm.

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