L1.2 : Cell Cycle

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Last updated 4:09 AM on 9/6/26
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15 Terms

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Positive and Negative Regulators

work together to control cell division and maintain genetic stability

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G0: Resting

The cell is not actively dividing. It is doing its normal job.

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G1: Growing

The cell grows, makes proteins, and gets ready to copy its DNA.

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S: Copying DNA

The cell copies its DNA, so the new cells will have the same genetic information.

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G2: Preparing

The cell checks the DNA and prepares everything needed for division.

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Mitosis

The cell divides into two daughter cells. This includes PMAT.

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  • Prophase

  • Metaphase

  • Anaphase

  • Telophase


PMAT

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Prophase

Chromosomes become visible and the cell prepares to divide.

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Metaphase

Chromosomes line up in the middle.

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Anaphase

Chromosomes separate and move to opposite sides.

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Telophase

Two new nuclei form.

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  • Change in DNA structure

  • Altered DNA function

  • Celular aberration

    • = Delular Death

    • Neoplastic change


Proposed Molecular Cause of Cancer:

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  • Proto-oncogene

  • Anti-oncogene


Genes in DNA

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Proto-oncogene

A normal gene that regulates cell growth and division but can become an oncogene when mutated, potentially leading to cancer

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Anti-oncogene

tumor suppressor genes, are regular genes that slow down cell division, repair DNA mistakes, or tell cells when to die