Shared Flashcard Set

Details

Cell Cycle
n/a
24
Biology
Undergraduate 4
11/01/2012

Additional Biology Flashcards

 


 

Cards

Term
Chromatin
Definition
The entire complex of DNA and proteins that is the buiding material of chromosomes (DNA + associated proteins)
Term
Cohesins
Definition
Protein complexes that attach 2 chromatids all along their lengths
Term
Centromere
Definition
A region containing specific DNA sequences where the chromatid is attached most closely to its sister chromatid
Term
Mitotic (M) Phase
Definition
Includes mitosis and cytokinesis
Term
Interphase
Definition
A cell that's about to divide, grows and copies its chromosome in preparation for cell division - Subphases: G1, S, G2
Term
Prophase
Definition

When the chromosomes begin to condense

Development of the aster

Nucleoli disappear

Term
Prometaphase
Definition

Nuclear envelope is gone

Each centromere is getting some of the microtubules.

 

Term
Metaphase
Definition

Chromosomes line up in the middle

Centrosomes at opposite poles

Term
Anaphase
Definition

Chromosomes pulled toward pole

Movement

 

Term
Telophase
Definition

Chromosomes reach poles and decondense

Nuclear envelope reforms

Term
Cytokinesis
Definition

Split at cleavage furrow

Division of cytoplasm

Term
Kinetochore
Definition

Structure of proteins associated with specific sections of chromosomal DNA at each centromere

Where microtubules attach

Term
Centrosome
Definition
Subcellular region containing material that functions throughout cell to organize the cell's microtubules
Term
Cell cycle control system
Definition
A cyclically operating set of molecules in cell that both triggers and coordinates key events in cell cycle
Term
M checkpoint
Definition
Cycle stops until all chromosomes are attached to kinetochore microtubules
Term
G1 checkpoint
Definition

"go, no-go"

 

Term
G0
Definition
Cell's not actively participating in cell cycle - no "go ahead" signal
Term
Protein kinases
Definition
Enzymes that activate or inactivate other proteins by phosphorylating them
Term
Growth factor
Definition

Protein released by certain cells that stimulates other cells to divide

 

Term
Density-dependent inhibition
Definition
Crowded cells stop dividing
Term
Anchorage dependence
Definition
To divide, cells must be attached to a stratum
Term
MPF
Definition
Cyclin activated protein kinase that triggers passage through the G2 checkpoint
Supporting users have an ad free experience!