Cell cycle & division 1
One reason cells divide
- To prevent cells from being to large
- For organisms to grow
- To replace damaged cells or tissues
Divison is called what in prokaryotes?
Binary fission
What does the S in S-DNA replication
Synthesis
How does cancer grow?
A broad group of proteins that stimulate cell division.
What is Cancer?
The uncontrolled growth and division of cells
Division in the nucleus is called what in eukaryotes?
Mitosis
The three stages of interphase;
G, S, and G2
What is it called when DNA is linear and condenses to many tightly packaged chromosomes?
Chromotin
What does the cell cycle have built-in that monitors the cycle and can stop it if something goes wrong?
Checkpoints
Benign tumors;
Abnormal growth of cells that are not cancerous and do not spread.
The three stages of Eukaryotes in the cell cycle
Interphase, mitosis, and cytokinisis.
Sister chromatids are pulled to the middle of the cell by spindle;
Metaphase
What are the sister chromatids pulled apart by?
Spindle apparatus
If a cyclin is not made, what happens?
It cannot pass to the next phase
Programmed cell death;
Apoptosis
At what stage do two new nuclear membranes begin to form?
Telophase/ Cytokinesis
What is the abbreviation of the process of mitosis
PMAT
At what stage do chromosomes begin to loosen and spread?
Telophase/ Cytokinisis
What tumor's cells break away and spread to other parts of the body?
Malignant Tumors
Defective p53 genes could lead to what?
Cancer
At which stage are the sister chromatids pulled apart by the spindle apparatus?
Anaphase
Which is the longest portion of the cell cycle?
Interphase
What is a single circular chromosome in the cytoplasm?
DNA
What is one substance that contains a carcinogen?
Cigarettes
What is very important in suppressing tumors?
p53