4.1.2.2 Mitosis and the Cell Cycle Flashcards
1
Q
What is the cell cycle?
A
- body cells in multicellular organisms dividing to produce new cells
- multiple stages
2
Q
What is the stage in a cell cycle when the cell divided called?
A
- mitosis
3
Q
What do multicellular organisms use mitosis for?
A
- growing or replacing cells that have been damaged
4
Q
What does the end of the cell cycle result in?
A
- two new cells identical to the original cell with the same number of chromosomes
5
Q
What are the three main stages of the cell cycle?
A
- DNA replication
- mitosis
- division
6
Q
What happens when te cell is not dividing?
A
- DNA is all spread out in long strings
7
Q
What happens before a cell divides?
A
- the cell has to grow and increase the e amount of subcellular structures
8
Q
What happens when a cell duplicates?
A
- it duplicates the DNA
- so there is one copy for each new cell
- forms x-shaped chromosomes
- each arm is an exact duplicate
9
Q
What happens during mitosis?
A
- chromosomes line up at the centre of the cell
- cell fibres pull them apart
- two arms of each chromosome go to opposite ends of the cell
- membranes form around chromosomes, becoming the nuclei
- cytoplasm and cell membrane divide
10
Q
What happens after mitosis?
A
- produced two new daughter cells that are identical to parent cell
