Vocab
What is the role and defention of the Nucleus and Cell membrane?
Nucleus: The membrane-enclosed organelle within a cell that contains the chromosomes. It's the repository of genetic information and is the cell's control center.
Cell Membrane: The semipermiable membrane surronding the cytoplasm of a cell. It regulates the transport of materials entering and exiting the cell.
What is the first stage of Cell division?
Interphase
What happens during Interphase?
- Cell grows and carries out normal cell processes
- DNA replicates
What is the role and defention of spindle fibers?
Defention: A network of filaments that are formed during the cell division process.
Role: Equaly divides the chromosomes in a parentle cell into two daughter cells.
What is the fourth stage of the cell cycle?
Anaphase
What happens during Prophase?
- Nuclear membrane disintegrates
- Nucleolus disappears
- Chromosomes condense
- Spindle apparatus begins to form between the poles.
What stage of the cell cycle is Cytokinesis?
The very last stage (sixth).
What is the role and defenition of Chromosomes?
Defenition: Thread-like structures located inside the nucleus of animal and plant cells.
Role: Carries genetic information from one generation to the next.
What is the secound stage of the cell cycle?
Phrophase
What happens during Metaphase?
- Chromosomes attach to the spindle apparatus and align along the equator of the cell.
What is the role and defenition of Centrioles?
Defention: Paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear envelope.
Role: Organize microtubules that serve as the cell's skeletal system.
What is the third stage of the cell cycle?
Metaphase
What happens during Anaphase?
- Microtubules shorten, moving chromosomes to opposite poles.
What happens to animal cells during Cytokinesis?
- Cleavage furrow forms at equator of cell and pinches inward until cell divides in two
What is the role and defention of Centromeres?
Defention: Structure in a chromosome that holds together the two chromatids.
Role: Helping cell divide up its DNA during division.
What is the fifth stage of the cell cycle?
Telophase
What happens during Telophase?
- Chromosomes reach poles of the cell
- Nuclear envelope re-forms
- Nucleolus reappears
- Chromosomes decondense
What happens to plant cells during Cytokinesis?
- Cell plate forms, dividing daughter cells.