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Mitosis
Mitosis and DNA
30
Other
Not Applicable
03/10/2004

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Term
Why do cells divide?
Definition
DNA overload,transport of materials across a membrane, ratio of surface area to volume
Term
Cell DIVISION
Definition
2 identical cells are formed
Daughter cells
Each has its own copy of DNA
Term
STAGES of the cell cycle
Definition
Interphase , prophase, metaphase, anaphase, telophase, cytokinesis
Term
Mitosis
Definition
cell repliaction----prophase, metaphase, anaphase, telophase
Term
Prophase of mitosis
Definition
chromatin condenses into chromosomes
centrioles separate and migrate to poles
spindle formation
nuclear membrane breaks down
Term
metaphase of mitosis
Definition
chromosome line up at equator
chromosomes connect to spindle fibers
( at centromere)
Term
Anaphase of mitosis
Definition
sister chromatids separate
chromosomes migrate toward poles
Term
Telophase of mitosis
Definition
chromosomes gather at pole
two nuclaer membranes form
Term
Cytokinesis
Definition
two new cells formed---daughter cells
duplicate set of chromosomes
Term
DNA
Definition
deoxyribonucleic acid
Term
cancer cells
Definition
divide excessively, able to spread into other parts of the body
Term
benign tumor
Definition
abnormal mass of essentially normal cells
Term
malignant tumor
Definition
lump resulting from the reproduction of a cancer cell
Term
metastasis
Definition
spread of cells
Term
treatment
Definition
radiation therapy, chemotherapy
Term
Griffith
Definition
somrthing was being transformed from the heat---killed bacteria from the harmless bacteria
Term
Avery
Definition
added enzyme that killed DNA, nothing transformed from griffith's experiment
Term
Hershey and Chase
Definition
DNA, not protein, was the genetic material being transformed
Term
DNA molecule
Definition
DNA- deoxyribonucleic acid
Term
Role of DNA in reproduction
Definition
all living things must be able to duplicate itself---- the DNA of genetic info is what is passed to the next generation
Term
DNA Molecule
Definition
made up of nucleotides,two strands that run opposite or antiparallel, double helix "ladder with rungs"
Term
Roslin Franklin
Definition
useed x-ray to reveal the helical structure
Term
Watson and crick
Definition
used franklin's x-rays to determine the double helix structure
Term
Double helix
Definition
two strands wound around one another, makes one chromosome with coding segments called genes, "twisted ladder"
Term
Nucleotides
Definition
sugar, phosphate group , base--Backbone- carbon sugar, deoxyribose and a phosphate group
Term
Rungs
Definition
nitrogen bases formed by hydrogen bonds
Term
BASES
Definition
Purines--Adenine, Guanine------Pyrimidines---- Thymine, Cytosine
Term
Base pairing
Definition
bases placed in a specific order--- form hydrogen bonds-- A with T and Cwith G
Term
DNA replication
Definition
DNA helicase enzyme--- unzips the DNA molecule-- breaks down hydrogen bonds, UNzipped strands become template for new DNA
Term
Dna polymerase enzyme
Definition
attaches bases to form complimentAry strands
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