Cell Growth & Division Flashcards
Name the building block if DNA?
Nucleotides
Why is it important for cells to maintain their surface area to volume ratio?
So that nutrients can diffuse diffuse into cells
Name the protein that wraps around the double-helix of DNA to start condensing?
Histones
The “spaghetti-like” form of DNA that is created by the condensing of the double helix is called?
Chromatin
What attaches the sister chromatids together?
Centromere
Name the 2 major phases of the cell cycle.
Interphase& M-phase
List the phases of Interphase and what occurs in each phase.
G1: cell growth, organelles replicate
S: DNA replicates
G2: addition cell growth
Mitosis is cell division that occurs in what type of cell?
Non-sex cells & body cells
What is the purpose of mitosis in multicellular organisms?
To allow the organism to grow longer
What is the purpose of mitosis in unicellular organisms?
Reproduction
In mitosis, 1 diploid parent cell divides to form:_______________
2 genetically identical
Explain the role of fibers in cell division.
Spindle fibers attach to centromere and pulls sister chromatids apart
What happens during prophase?
- Spindle fibers form
- Centrioles start to move to opposite poles
- Nuclear membrane disappears
What happens during metaphase?
- Sister chromatids line up in the middle of cell
- Spindle fibers attach to centromere
- Centrioles on opposite ends of cells
What happens during anaphase?
Chromatids pulled apart by shortening spindle fibers
