The Mitotic Cell Cycle Flashcards
Chromatin:
DNA+protein
Why can histones interact easily with DNA?
Because histones are basic proteins and DNA is acidic
Why there are two chromatids
During interphase each DNA molecule in a nucleus makes an identical copy of itself.
Cytokinesis :
In animal cells , cell division involves constriction of the cytoplasm between the two new nuclei the process is called cytokinesis
Stages of cell cycle:
Interphase
Nuclear division
Cell division
What happens during G1 phase?
Cell make the RNA/enzyme and other proteins needed for growth
At the end of G1 cell becomes committed to dividing or dividing not
What happens during G2 phase
Cell continues to grow and the new DNA that was made during s phase is checked
(Errors are usually repaired
2.preparations are made to begin (sharp increases in production of tubulin that is needed to make microtubules for the mitotic spindle
Does plant cells contain centrosomes?
No
After nuclear division of a plant cell what should be formed between the daughter nuclei?
A new cell wall
What is centrosome responsible for?
Responsible for making the spindles
What are spindles made of?
Microtublues
Centrosomes act as…..
MTOC(microtubule organising center
Does centrioles control the production of the microtubules?
No
What controls the production of microtubules?
The larg amount of proteins around centriols
Kinetochore?
A protein structure found at the centromere of chromatids to which microtubules attach during nuclear division
