Lecture 4-Passing G0

Lecture 4-Passing G0 - Lecture 4 Passing G0 Why do cells...

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Lecture 4- Passing G0 Why do cells divide? -Reproduction, growth and development, tissue renewal and repair Cell Division in Plants -You tend to find meristematic tissue where the cell is growing (actively dividing cells) -Tips of roots, leaves, etc. Undifferentiated, small -Primary growth: tree gets taller -Secondary growth: tree gets thicker -Cambium: a tissue where cells are actively dividing Cell Cycle- Highly controlled G2- period after DNA replicates, prepares for division, organizes DNA Mitosis- prophase, metaphase, anaphase, telophase/cytokinesis Interphase G1-first gap; period of cell growth before the DNA replicates. Cell growing, fresh out of mitosis, makes proteins and other cellular molecules G0- cell cycle arrest; in developed organs, the cells are not actively cycling, and are just living in G0 S- period when DNA replicates and chromosomal proteins are duplicated; DNA synthesis Internal Cell Cycle Check-points 1) CDK2 controls the transition from G1 to S phase. Cyclin E binds to the CDK2 enzyme;
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This note was uploaded on 04/04/2009 for the course BIOLOGY 1222 taught by Professor Haffie during the Spring '09 term at UWO.

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Lecture 4-Passing G0 - Lecture 4 Passing G0 Why do cells...

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