Module 2 Section 6 - The Cell Cycle and Mitosis Flashcards
What is the cell cycle
The process that all body cells in multicellular organisms use to grow and divide
When does the cell cycle start
When a cell has been produced by cell division
When does the cell cycle end
It ends with the cell dividing to produce two identical cells
What does the cell cycle consist of
Interphase (Cell growth and DNA replication)
M Phase (Mitosis and cytokinesis)
Interphase is divided into 3 stages what are they
G1 (gap phase 1), S (synthesis), G2 (gap phase 2)
What happens in gap phase 1
In gap phase 1 the cell grows and new organelles and proteins are made
How is the cell cycle regulated
By checkpoints
When do checkpoints occur
At key points during the cycle to make sure it’s ok for the process to continue
What happens after g1
The cell undergoes checks at the g1 checkpoint
What does the g1 checkpoint check for
Checks that the chemicals needed for replication are present and checks for damage to the DNA before enter S-phase
After passing the g1 checkpoint what happens to a cell in the cell cycle
The cell enters synthesis phase
What happens in the synthesis phase in the cell cycle
The cell replicates it’s DNA ready to divide by mitosis
What happens to the cell after synthesis stage
It enters g2 (gap phase 2)
What happens in g2
Cell keeps growing and proteins needed for cell division are made
What happens after g2
The cell has to clear the g2 checkpoint
