Flashcards in Chapter 9 Cell Cycle Deck (42):
Set of stages that takes place between eukaryotic cell division and resulting daughter cells dividing
Most of the cell cycle is spent here. Constists of G1, S, and G2
"Growth". Cell grows in size and increases the number of organelles
DNA synthesis or replication
Two identical chromatids
Cell synthesizes the proteins that will assist cell division
Includes mitosis and cytokinesis.
What stages are in the cell cycle
G1, S, G2 and M
Stop signs, signaling proteins
POP, cell suicide
The body cells that did not go through meiosis to become sperm of egg
How much DNA is in a human cell
Atleast 2 meters
Loosely cooled DNA
Highly compact form of the chromosome
DNA in cells that are not actively dividing
Tightly coiled and condensed DNA in cells that are dividing
What is a diploid
Two copies of each chromosome
What is a haploid
One copy of each chromosome
Are the cells in our body haploid or diploid?
Almost all are diploid
Only exception is sperm cells, they are haploid
Region where sister chromatids are held together
Protein complex around centromere
What are the phases of mitosis?
Nuclear envelope starts to develop
Spindle begins to assemble
Kinetichores become visible
Sister chromatids attach
Centromeres are aligned
M checkpoint! Cell cycle cannot progress until chromosomes are:
-attached to spindle fibers
-aligned at the metaphase plate
Sister chromatids separate
Cleavage furrow forms
Nuclear envelope forms around daughter cells
Division of cytoplasm
Cytokinesis in animal cells?
Cytokinesis in plant cells?
No cleavage furrow, cell wall doesn't allow it
What is cancer
When the cell cycle goes wrong
Cellular growth disorder when cells divide uncontrollably
Abnormal cell growth
Cancerous, can spread
Cancer cells go through metastis and angiogenesis, what are they?
Metastasis: ability to spread to other areas of the body
Angiogenesis: formation of new blood vessels to supply tumor with oxygen and nutrients
What causes cancer?
Proto-oncogenes and tumor suppressor genes
Genes that normally promise cell
"Gas pedal" non stop growth
Tumor suppressor gene
Brakes, gene that normally inhibit the cell cycle
Unicellular organisms use cell division for what?
Asexual reproduction, making an entire organism!
Multicellular organisms use cell division for what?
Part of growth, development and repair
The process by which a cancer travels through the blood and invades new tissues