Unit 3 key words Flashcards
Histones
protein that contains a genome
Nucleosomes
8 histones + 146 bp / coiled histones
genome
A haploid set of chromosomes in a microorganism
Cell division
Where 1 cell splits into two identical daughter cells
Daughter cells
Cells that come from 1 single parent cell
Chromosomes arm
The second half and a bigger part of a whole chromosome
G1
-cell increases
-increase in # of ribosomes
G2
Organelles will replicate
Final stage
S
DNA replication
Interphase
Where chromosomes duplicate and cell parts are made
Miotic phase / M phase
Where cell division occurs
Biochemical activity
The way the body converts food into energy
Sister chromatids
2 identical chromatids formed by the replication of chromosomes
Cohesions
sticking of particles
Centrosome
Organelle that regulates cell mobility
Aster
radical array of short microtubules
Nonkinetochore
don’t attach to the centromere
Miotic phase
where single parent makes daughter cells
prophase
the first stage of mitosis
Anaphase
¨apart¨, sister chromosomes separate and move along the kinetochore
separase
protein that helps with chromosome segragation
Depolymerizing
cell has a shift in electric charge distributin
Nuclear envolope
Organelle that separates the nucleus and cytoplasm in euk. cells
Nucleolus
organelle that surrounds the nucleus
Telophase
¨opposite of prophase¨ daughter cells are about to separate
Kinetochore
attach to centromere
Haploid
cell that has a single set of chromosomes
Diploid
cell that has 2 sets of chromosomes
Cytokinesis
splitting the cell
Karyokinesis
splitting the nucleus
Golgi Complex
stack of small flat sacs (can look it up to see),prepares molecules to go in or out the cell
Cell plate
a structure that forms when the cytoplasm of a plant cell divides (imagine a line separating a cell)
Cdk
regulatory control of cell cycle -
Cell Wall
covers the outermost of the cell
density-independent inhibition
occurs when cells grow to a limited density then growth becomes inhibited
Cylin
cycles /regulatory control of cell cycle
Differentation
selective gene expression
G0
phase where nothing happens
Cancer
runaway cellular division
proto-oncogenes
normal genes which affect normal cell growth and proliferation,
sexual reproduction
genetic variability
meiosis
chromosome # is reduced by 1/2
fertilization
fusion of male and female sex cells(gametes)
2n
Diploid
n
Haploid
Gamete
Any haploid cell capable of fusing w/ another haploid cell to form a new idv.
Homologous chromosomes
Structurally identical chromosomes
genetic variability
Each cell contains new combinations of chromosomes
Meiosis 1
type of cell division, G1 S G2 phases occurs here
Prophase 1
the first meiotic division