The genetic material in a bacterial cell is arranged differently to the genetic material in an animal cell.Which of the following describes a difference?Bacterial cells have circular DNA, whereas animal cells have linear DNA.Bacterial cells do not contain a nucleus or plasmids, whereas animal cells have both a nucleus and plasmids.Bacterial cells have multiple chromosomes, whereas animal cells have one.Bacterial cells have their DNA contained in a nucleus, whereas animal cells do not.
Question
The genetic material in a bacterial cell is arranged differently to the genetic material in an animal cell.Which of the following describes a difference?Bacterial cells have circular DNA, whereas animal cells have linear DNA.Bacterial cells do not contain a nucleus or plasmids, whereas animal cells have both a nucleus and plasmids.Bacterial cells have multiple chromosomes, whereas animal cells have one.Bacterial cells have their DNA contained in a nucleus, whereas animal cells do not.
Solution
The correct answer is: Bacterial cells have circular DNA, whereas animal cells have linear DNA.
Here's why:
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Bacterial cells have a single circular chromosome that floats freely in the cytoplasm. This is different from animal cells, which have multiple linear chromosomes located inside a nucleus.
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Bacterial cells do contain plasmids, which are small, circular pieces of DNA that are separate from the main bacterial chromosome. Animal cells do not typically contain plasmids.
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The statement that bacterial cells have multiple chromosomes is incorrect. Bacterial cells typically have a single circular chromosome.
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The statement that bacterial cells have their DNA contained in a nucleus is also incorrect. Bacterial cells do not have a nucleus. Their DNA is located in the cytoplasm. In contrast, animal cells do have a nucleus where their DNA is stored.
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