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Biology 2.1.6 Cell cycle/mitosis
Fichas del conjunto (24)
- 1What are the three stages of interphase?G1, S-phase, G2
- 2What happens during G1?The cell grows
- 3What happens during S-phase of interphase?Semi conservative replication occurs, there are now two chromatids
- 4What happens during G2?The cell continues to grow and the cell prepares for division. DNA is checked
- 5Describe what the chromosomes are like during interphaseUncoiled, thin and not visible.
- 6What organelles are reproduced during interphase?Mitochrondria and chloroplasts
- 7What are the four stages of mitosis (in order)?Prophase
Metaphase
Anaphase
Telophase - 8Describe what the chromosomes look like during prophase and metaphase of mitosisCoiled, short, fat
- 9What happens to chromosomes durng prophase?Chromosomes become visible as they shorten and thicken
- 10Fill in the gap: The ______ _______ breaks down during prophaseThe nuclear envelope breaks down
- 11What happens during metaphase?Chromosomes line up at the equator of the cell
The spindle fibres attach to the centromere of each chromosome - 12What happens during anaphase?Chromatids are pulled apart to opposite ends (poles) of the cell
The centromere divides
- 13What happens during telophase?The nuclear envelope reforms around the chromosomes
- 14What is cytokinesis?Where the cell finally divides into two daughter cells
- 15What is formed in between cells during plant cell cytokinesis?A cell plate (cytokinesis starts from the middle of the cell)
- 16Why is mitosis important?Growth of multicellular organisms
Repairs tissue
Asexual reproduction ("runners" for strawberry plants) - 17What is the purpose of checkpoints during mitosis?Prevents uncontrollable division, leading to tumours
Detect and repair damaged DNA
Ensures the cycle isnt reversed - 18Where are the three checkpoints?Near the end of G1 (G1 checkpoint)
End of G2 (G2 checkpoint)
End of metaphase (spindle assembly checkpoint) - 19What is G0 phase? Why would a cell go into G0? What does the cell do in G0?The resting phase of the cell
If they dont meet checkpoint requirements
They grow and can differenciate - 20What is checked at the G1 checkpoint?Cell size
DNA damage - 21What is checked for at the G2 checkpoint?Cell size
All DNA is replicated - 22What is checked at the spindle assembly checkpoint?Checks that all centromeres are attached to spindle fibres
- 23Where does mitosis take place in plants?Meristems
Found on the end of root tips and shoot tips - 24State two differneces between cell division in plants and animal cellsIn plants, there are no centrioles, in animals, centrioles are present
Cell division in plants only occurs in the meristems but it occurs throughout the body in animals
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- El usuario ha eliminado su información de asignaturas Fichas sobre Biology 2.1.6 Cell cycle/mitosis, creado por Usuario eliminado el 07/06/2019.
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- Usuario eliminado · jun 2019
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- Creado por Sam Gunnell · 8 feb 2019
- Copiado por Sam Gunnell · 7 jun 2019
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