Number of chromosomes in E.coli ?

Correct answer: A. 1

  • A. 1
  • B. 2
  • C. 4
  • D. 6

Explanation

A typical E. coli cell has one main circular bacterial chromosome, although it may also carry smaller plasmids that are not counted as its main chromosome. Students may choose two because they confuse the chromosome with plasmids or with the duplicated state before cell division.

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About Prokaryotic and Eukaryotic Cells

Prokaryotic cells lack a membrane-bound nucleus and complex membrane-bound organelles, whereas eukaryotic cells contain a nucleus, specialized organelles and a cytoskeleton. Comparisons include DNA organization, ribosomes, cell walls, size, division and examples such as bacteria, archaea, protists, fungi, plants and animals.

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