CELL CYCLE Flashcards
Gap 1, synthesis, gap 2, + mitosis
Cell cycle four main stages
Regular pattern of growth, DNA replication, a cell division
Cell cycle
Cell growth/normal functions
Gap 1 (G,)
Copies DNA
DNA synthesis (S)
Additional growth
Gap 2 (G2)
All happen in interphase
Gail, DNA synthesis, gap 2
Includes division of cell nucleus + division of cytoplasm
Mitosis
Occurs only if cell is large enough and DNA unharmed
Mitosis (m)
What stage splits the nucleus
Mitosis
Non-division phase
(Go) Gap 0
Neurons (nerves don’t
Regenerate
Cell size is limited
Volume> surface area
Surface area must allow for
Adequate exchange of materials
Cell growth is coordinated with
Division
Cells that must be large have
Unique shapes
Condense @ start of mitosis
Chromosomes
Humans: _ _ chromosomes
46
Nucleotides =
H-bonds
Sugar + phosphate =
covalent bond
DNA double helix include
Nucleotides + sugar / phosphate
Half of coiled chromosome
Chromatid
Holds sister chromatids together
Centromere
DNA plus are called
Chromatin
1/2 of duplicated chromosome =
Chromatid
Sister chromatids held by
Centromere
- protect DNA + do not include genes
Telomeres
