Cell Cycle Notes

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Cell Cycle
Created @December 2, 2024 9:44 PM

Class Cells to Systems

Cell cycle

Instructions for producing cell parts

DNA must be replicated

Every new cell has identical copy of DNA

Mechanisms in place to ensure copies are identical



Interphase

G1

Cell grows larger

more organelles are produced

“Checkpoint” is established

Ensures no damage is present

S Phase

Rapid DNA replication and duplication of the centrosome for DNA
separation

G2

Cell increases in size

reorganises cell contents

checks for DNA structure



Cell Cycle 1

, Mitosis

Nuclear division

Cytokinesis
Cells moving apart



Mitosis

Cell division producing two identical cells

Daughter cell gets perfect cell of chromosomes

Too few/ too many chromos can lead to improper function in cells



Mitosis Steps

Early prophase

Chromosome division

chromos begin to condense

Late prophase/ prometaphase

Spindle sorts compact chromosomes

Nuclear envelope breaks down

Metaphase

Chromosomes align on centre line

Attaches to spindle fibres from opposite sides

Anaphase

Chromatids separated

pulled to opposite ends of cell

Telophase

Cell has nearly completed dividing

normal structures come to be



Cell Cycle 2