What best describes the content of plasmids in bacteria?

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Prepare for the WGU NURS1010 Microbiology Exam with engaging study materials, flashcards, and multiple choice questions. Enhance your understanding with detailed explanations and insights. Get exam-ready today!

Multiple Choice

What best describes the content of plasmids in bacteria?

Explanation:
Plasmids are small, circular DNA molecules that exist outside the bacterial chromosome. They replicate independently and typically carry genes that aren’t essential for basic survival but provide advantages under certain conditions, such as antibiotic resistance or virulence factors. Because they’re extra-chromosomal, plasmids can be gained or lost by bacteria and sometimes transferred between cells, spreading these traits. This sets them apart from the main chromosomal DNA, which contains essential housekeeping genes. Ribosomal RNA genes are usually on the chromosome, not on plasmids, and bacteria don’t have mitochondrial DNA.

Plasmids are small, circular DNA molecules that exist outside the bacterial chromosome. They replicate independently and typically carry genes that aren’t essential for basic survival but provide advantages under certain conditions, such as antibiotic resistance or virulence factors. Because they’re extra-chromosomal, plasmids can be gained or lost by bacteria and sometimes transferred between cells, spreading these traits. This sets them apart from the main chromosomal DNA, which contains essential housekeeping genes. Ribosomal RNA genes are usually on the chromosome, not on plasmids, and bacteria don’t have mitochondrial DNA.

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