MITOSIS AQA BIOLOGY A LEVEL/AS
EVERYTHING you need to know about mitosis for AQA BIOLOGY A-LEVEL/AS
- Created by: monicaraviraj
- Created on: 28-10-18 13:48
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- MITOSIS
- INTERPHASE
- Cell continues to carry out normal functions
- Cell DNA Replication
- Organelles replicate
- ATP content is increased (ATP provides the energy needed for cell division)
- PROPHASE
- Chromosomes get shorter and fatter
- Tiny bundles of proteins called centrioles start moving to opposite ends of cell - They form a network of fibres called a spindle
- The nuclear membrane breaks down and the chromosomes lie free in the cytoplasm
- METAPHASE
- Chromosomes are made of two chromatids joined by a centromere
- Spindle apparatus pulls the chromosomes by their centromeres to line up along the equator of the cell.
- ANAPHASE
- Centromeres divide and spindle fibre pull the chromatids apart
- The energy for this process is provided by the mitochondria
- TELOPHASE
- Chromosomes reach the poles
- Chromosomes get longer and thinner
- spindle fibres disappear and nuclear envelope and nucleolus re-form
- CYTOKINESIS
- cytoplasm divides
- INTERPHASE
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