1.6 - Cell division - Key terms

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International Baccalaureate Biology (1 - Cell Biology) Flashcards on 1.6 - Cell division - Key terms, created by Ella-mentary on 01/15/2016.

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Question Answer
Cell cycle The life cycle of the cell, includes interphase, the four phases of mitosis, and cytokinesis.
Interphase The period of the cell cycle between cell division. Organelles replicate and DNA synthesis happens.
Prophase The first phase of mitosis. Chromosomes become visible (DNA coils up) and the centrioles separate to opposite sides of the cell (in animals).
Metaphase The second phase of mitosis, the chromosomes line up on the spindle, across the center of the cell.
Anaphase The third phase of mitosis, centromeres split, the spindle fibres shorten and chromosomes separate.
Telophase The the final stage of mitosis, a nuclear membrane forms around each set of new chromosomes.
Cytokinesis The final stage of the mitosis, in which the cell's cytoplasm divides into two new cells.
Mitosis Cell division in which the nucleus divides into two nuclei containing the same number of chromosomes.
Mitotic index The number of cells within a microscopic field that are undergoing mitosis; a high mitotic index is usually a more virulent malignancy.
Mutagens A chemical or physical agent that interacts with DNA and causes a mutation.
Oncogenes A gene whose activity is associated with the conversion of normal cells to cancer cells.
Metastasis The spread of cancer from its primary site to other places in the body.
Prognostic tool A method of predicting a future event, e.g. response of cancer cells to treatment.
Primary tumor The original site of a tumor, where the tumor originated.
Cyclins A group of proteins whose function is to regulate the progression of a cell through the cell cycle.
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