The genomic DNA of a bacterium is typically a single chromosome that is circular. Many bacteria also have smaller circular DNA outside the genomic DNA called:
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Correct answer: Plasmid
Plasmids are small, extrachromosomal, self-replicating circular DNA molecules. They often carry specific phenotypic characters such as resistance to antibiotics.
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More Prokaryotic Cell Structure questions
- What is the correct sequence of the layers of a typical bacterial cell envelope from outermost to innermost?
- A specialized differentiated form of cell membrane that is the characteristic of prokaryotes is the:
- In some bacteria, the glycocalyx is a loose sheath called the ______, while in others it is thick and tough called the ______.
- Bacterial flagellum is composed of three parts. Which of the following is the longest portion?
- Which surface structures of bacteria do not play a role in motility but help in attachment to rocks or host tissues?
- The ribosomes of prokaryotes are of the 70S type. What are the two subunits of these ribosomes?