Chapter 5.1-5.3 Test Flashcards
how did the g1 and g2 stages get their names?
scientists could not see anything happening during these parts of interphase, so they name the periods between mitosis and sythesis “gap1” and “gap2”
Summarize what happens during each stage of the cell cycle
g1: normal functions, organelles multiply, cell growth
s/synthesis: DNA sythesis
g2: additional cell growth
mitosis: cell division
cells must pass through a critical checkpiont during which two stages of the cell cycle
Gap1 and gap2
where does the DNA sythesis happen in eukaryotic cells
the nucleus
what two processes make up the M stage
mitosis and cytokinesis
what process divides a cells cytoplasm? how do the two word parts of you answer help you remember it?
cytokinesis; cyto= cytoplasm and kinesis=division
what process divides the cell nucleus and its contents?
mitosis
what is a chromosome
long, continuous thread of DNA that consists of mumerous genes and regulatory information
why do chromosomes condense at the start of mitosis
so they are organized in order to make division easier
why are chromosomes not condensed during all stages of the cell cycle
the DNA needs to be replicated
how does interphase prepare a cell to divide
it multiplies its organelles and genetic information
mitosis occurs in what types of cells
eukaryotic
dNA wraps around organizing protiens called
histones
the suffix -tin indicates that something is stretched thin ______ is the loose combination of DNA and protiens that looks like spaghetti
chromatin
sister chromatids are held together at the _______, which lookes pinched
centromere
