Mitosis, a type of cell division, is observed in ?
Correct answer: E. None of these
- A. E. Coli
- B. Nostoc
- C. Blue green algae
- D. Cyanobacteria
- E. None of these
Explanation
Mitosis is the process by which a eukaryotic somatic cell divides to produce two genetically identical daughter cells. It ensures that each daughter gets an exact copy of the parent cell's linear chromosomes; the DNA is first replicated during S phase of interphase, and then mitosis apportions the duplicated chromosomes so the two new nuclei are genetically identical. Mitosis proceeds through a well-defined sequence of stages - prophase, prometaphase, metaphase, anaphase, and telophase - coordinated with cytokinesis (physical cell splitting). Key features of mitosis include condensation of chromatin into visible chromosomes, formation of the mitotic spindle (microtubule-based apparatus) to move chromosomes, and precise separation of sister chromatids to opposite poles.
This question appeared on the UHS MDCAT 2023 paper, which you can sit online with every answer explained.
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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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