the cell cycle quiz

cells

what is the cell cycle?

the cell cycle is the life of a cell from the time it is 1st formed from a dividing parents cell until its own division into 2 cells

what is cell division?

the reproduction of cells

what is the purpose of cell division?

growth, maintenance, and repair

what do single celled organisms produce?

identical daughter cells

what do multi celled organisms produce?

haploid reproductive cells

what is a genome?

a cells complete genetic information (DNA)

whose genomes differ?

prokaryotic and eukaryotic

what is the structure of a prokaryotes genome?

a single long DNA molecule

what is the structure of a eukaryotic genome?

several DNA molecules

each eukaryotic DNA molecule will:?

coil and form a chromosome

each eukaryotic DNA molecule contains __ __to__ ____ of genes

100’s-1000’s

where can you find each species magic number of chromosomes?

somatic cell

somatic cells?

body cells, diploid, 2N

cells with a full set of chromosomes?

skin cells, muscle cells, nerve cells

are cells with a full set of chromosomes somatic cells?

yes

what are gametes

reproductive cells, haploid, 1N

gametes contain____ as many chromosomes as somatic

half

What are examples of gametes?

sperm or egg

how many chromosomes do each new life begin with?

46

reproductive cells are formed with ___ chromosomes

23

the cell cycle consists of…?

interphase and the mitotic phase

interphase is alternates with the ____?

M phase

interphase accounts for about ____ of the cell cycle

90%

interphase makes allows the cell to___?

grow, copies its chromosomes and prepare for division

G1- the cell grows:

by producing proteins and organelles

S- cell grows and ____

copies chromosomes

G2- cell grows more and____

completes preparation for division

time for M-phase

1hr

time for G1

5-6hrs

time for S-

10-12hrs

time for G2-

5-6hrs

centrosomes organize-

microtubules

sister chromosomes are identical copies of--

chromosomes bound to each other

Kinetochores are protein fibers--

attached to chromosomes and microtubules

kinetochores microtubules are attached to chromosomes and

centresomes; chromosomes “walk”along these toward poles

nonkinetochores microtubules are overlapping microtubules that

elongate the cell during anaphase

a cell goes

1-2, 2-4, 3-8, 4-16, 5-32

where does cell division spend the most time

the s phase

interphase includes:

G1, G2, S phases

1 hour of the m phase is ___%

4\.17%

g1 phase and s phase is about

15-20 and 60-70

G2 phase in percent=

12-22