Cells that contain only circular chromosomes are most probably which of the following?

Question

BlackTom AI · Accepted Answer

Question restatement: The prompt asks which type of cells are most likely to contain only circular chromosomes.
Option 1: Fungal cells. Fungi are eukaryotic organisms that typically have linear chromosomes contained within a nucleus. Therefore, fungal cells do not fit the description of having only circular chromosomes.
Option 2: Bacterial cells. Bacteria are prokaryotes whose genomes are typically a single circular chromosome located in the nucleoid region, not enclosed by a nuclear membrane. This matches the clue about circular chromosomes and is the best fit among the choices.
Option 3: Protist cells. Protists are a diverse group of mostly eukaryotic organisms; their chromosomes are generally linear and housed in a nucleus, not circular. This makes protists unlikely to have only circular chromosomes.
Option 4: Plant cells. Plant cells are eukaryotic and contain linear chromosomes within a nucleus, often accompanied by organelle genomes, but not typically circular chromosomes as the sole genetic material of the nucleus. Hence, they do not fit the clue.
Option 5: Animal cells. Similar to plants, animal cells are eukaryotic with linear chromosomes in a nucleus, not circular. They do not satisfy the condition of containing only circular chromosomes.
In summary, the hallmark of many bacterial genomes is a single circular chromosome, whereas the other listed groups predominantly have linear chromosomes in a nucleus. This makes N = Bacterial cells the most probable answer for cells that contain only circular chromosomes.

APBIO142-030 with labs S16 - CollegeBoard* AP Exam Prep: Multiple Choice

Cells that contain only circular chromosomes are most probably which of the following?

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