Cell Cycles - Demi Daries Flashcards
The cell cycle is divided into?
- Interphase
- Mitosis
What is Interphase?
- Two consecutive cell divisions
- Cell growth and DNA replication take place
Four Phases of Mitosis
- Prophase
- Metaphase
- Anaphase
- Telophase
The role of Mitosis
New cells are formed in order to:
- Organism grows
- Ensure that damaged cells are repaired and replaced
What is Cancer?
- Uncontrolled mitotic cell division
- Group of cells that lose their original function
- Repeated divisions of tissue is formed
Causes of Cancer
- Cigarette Smoke
- Hereditary factors
- Sun
- Pollutants
- Radiation (e.g. x-rays)
- Certain Chemicals
Treatment of Cancer
- Surgery
- Radiotherapy
- Chemotherapy
One event in Prophase
-Chromatin Network becomes shorter and thicker and visible as Chromosomes
OR
-The nuclear membrane and nucleolus disappear
OR
-Centrioles separate and move opposite poles of the cell
One event in Metaphase
-Chromosomes move to the equator and arrange themselves in a single row on the equator
OR
-Spindle fibres attach to the Centomere
One event in Anaphase
-The centromere of each Chromosomes divides into two
OR
-The chromatids are now known as DAUGHTER chromosomes
OR
-Cytokinesis (Division of the cytoplasm) begins
One event in Telophase
-Daughter chromosomes arrange themselves at the poles
OR
-The cytoplasm divides (cytokinesis)
Out of the two parts that is divided in the cell cycle, which part takes up the largest part?
Interphase
