DNA replication and cell division 3-2-11

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Nucleotide

building blocks of DNA

nucleotides are made up of what 3 parts???

sugar, phosphate, and base

nitrogin bases are

adenine, thymine, Guanine, and Cytosine

Double helix is held together by.......

hydrogen

first person to come up with the first double helix model

watson and crick

a GOES WITH

T

G goes with

c

Process of making a copy of DNA is called

DNA replication

first step in DNA replication is.......

it unwinds

2nd step in DNA replication is.....

breaks hydrogen bonds between bases

3rd step in DNA replication is......

unzipping

4th step in DAN replication is............

frees nucleotides and attaches to open bases

5th step in DNA replication is............

the 2 double helix is complete

Chromosome

structure within the nuclus containing genetic info. that is passes from 1 generation th the next

phases of the cell cycle are>>>

G1 phase, s phase, G2 phase ,and Mitosis

G1 phases

cell growth

s phase

DNA replication

G2 phase

preparation 4 miosis

Mitosis

CELL DIVISION

A human cell has ____ chromosomes

46

Cancer

cells lose the ability to controle growth, no linger respont to signals

Animal cell

clevage furrow

Plant cell

cel plate

nerve

THIS cell never dies after matrity

interphase

DNA replication takes place

metaphase

chromosomes are lined up in the cells equator

prophase

spindle fibers appear and the nuclear membrane in brocken down

telophase

nucleus and nuclear membrane reappear

anaphase

sister chromatids are pulled apart twards oppesit ends of the cell

DNA is located in......

the nucleus

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