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General Biology: Cell Cycle and Chromosome Structure

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Termini in questo insieme (20)

  • Structure of a chromosome in a non-dividing cell
    One long DNA molecule, associated with many proteins.
  • Number of chromatids in a human bone marrow cell in prophase
    92 chromatids, as each chromosome has duplicated into two sister chromatids.
  • Phase including all stages of mitosis but no other events
    The mitotic phase (M phase) includes prophase, metaphase, anaphase, and telophase.
  • Cell cycle phase where both nucleus and cytoplasm contents divide
    The mitotic phase.
  • Cell cycle phase where the cell grows and replicates organelles and chromosomes
    Interphase, specifically the S phase for DNA replication and G1 for growth.
  • Correct match: G1 phase description
    G1 follows cell division and is a period of cell growth.
  • Phase when nucleoli are present
    Nucleoli are present during interphase.
  • Phase when chromosomes become visible
    Chromosomes become visible during prophase.
  • Phase when centromeres divide and sister chromatids become chromosomes
    Anaphase.
  • Phase when spindle fibers attach to kinetochores
    Prometaphase.
  • Function of kinetochores
    Sites where microtubules attach to chromosomes during mitosis.
  • Cell type showing a cell plate during cytokinesis
    A plant cell in the process of cytokinesis.
  • Feature unique to binary fission but not mitosis
    Duplicated chromosomes attach to the plasma membrane.
  • Cell cycle phase checkpoint for division signals
    G1 phase checkpoint.
  • Characteristic of benign tumors but not malignant tumors
    They remain confined to their original site.
  • Example of a carcinogen
    UV light.
  • Carcinogen that promotes colon cancer
    Fat.
  • True statement about all cancers
    They have escaped normal cell cycle controls.
  • Chromosome composition after DNA replication
    Two identical DNA molecules called sister chromatids.
  • Origin of microtubules of the spindle during mitosis in animal cells
    Centrosome.