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OCR A A Level and AS Level OCR A Biology Module 2 (2.6) Cell division Summary and revision notes. £6.46   Add to cart

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OCR A A Level and AS Level OCR A Biology Module 2 (2.6) Cell division Summary and revision notes.

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ALevel and AS Level Biology OCRA Biology Module 2 (2.6) Cell division. Revision notes and summary notes. H020 and H420. OCR Specification. Breadth and depth of biology. Paper 1,2,3

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  • September 5, 2024
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Biology OCR Module 2.6
Cell division

, 6.1 A) The cell cycle:

The cell cycle is a highly ordered sequence of events that takes place in a cell, resulting in division of
the cell and the formation of two genetically identical daughter cells.
G1-Growth phase:
• Cells grow and increase in size
• Transcription of genes made
• protein synthesis occurs
• organelles duplicate
G1 checkpoint ensures the cell is ready for DNA synthesis


S- synthesis phase:
• DNA replicates producing identical sister chromatids
CDK complexes ensures all DNA is replicated once


G2-Growth:
• Cells grow
• Energy stores grow
G2 checkpoint ensures the cell is ready for Mitotic phase

M-Mitosis:
• Cell growth stops
• Nuclear division-PMAT

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