Cell Cycle Flashcards
Why cells divide
To get materials such (food, water, oxygen and waste) into/out of cell EFFICIENTLY
So DNA can make enough proteins to run cell
Cell division
Process when a cell divides into two daughter cells
Cell cycle
Process of one cell dividing to become two cells
Occurs in somatic (body) cells, & each cell will have the same genetic info
Cell cycle
Main Stages of the Cell Cycle
Interphase. Mitosis. Cytokinesis
A period of cell growth and DNA replication for all cells
Interphase
The cell grows in size so it can divide into two. Chromosomes are single stranded
chromosomes condense in nucleus
G1
Cell stops growing
Chromosomes replicate & become double-stranded
S (synthesis of DNA)
Ce grows new organelles and prepares to divide
G2
Mitosis
Division of the nucleus (2 cells are made)
Division of the cytoplasm
Cytokinesis
Cell builds a cell plate between the two nuclei (that will become the new cell wall for each cell.)
Plant Cytikonesis
Cell Cleaves (pinches) in the middle and becomes two different cells
Animal Cytikinesis
Proteins that regulate timing of the cell cycle
Cyclins
Make sure there’s no uncontrolled cell growth
Without them growing leads to cancer and tumors
Cyclins