History
Review
DNA Structure
Enzymes
More
100
he found nucleic acid in nucleus of cells in pus
Friedrich Mischer
100
what organelle is known as the control center of the cell
NUCLEUS
100
DNA is polymer of
THOUSANDS OF NUCLEOTIDE MONOMERS
100
Pyramidines are
single ringed
Cytosine & Thyamine
100
deoxyribose is a
sugar with 5 carbon atoms in a ring
200
used ENZYMES to show DNA is the biochemical molecule of heredity
Avery and McCarty
200
what structures are found in the nucleus
chromosomes
200
shape of DNA
double helix (twisted ladder)
200
deoxyribose has one OH group missing and it just has
H group
-it has one LESS oxygen
-think: dead oxygen --- deoxy
200
"rungs of ladder" (steps of ladder)
nitrogen bases
300
DNA is a source of genetic material that enters bacteria FROM VIRUS and takes it over
Hershey and Chase
300
short segments of chromosomes
Genes
300
An individual unit of DNA is a NUCLEOTIDE. The 3 parts of a DNA nucleotide are:
Deoxyribose sugar
Phosphate group
Nitrogen base
300
topoisomerase
corrects "overwinding"
300
"sides of ladder"
sugar and phosphate groups
AKA
DNA backbone
400
Xray diffraction picture showed DNA structure
Wilkins and Franklin
400
genes/chromosomes are composed of
DNA
400
four nitrogen bases
Adenine
Thymine
Cytosine
Guanine
400
helicase
unzips parent DNA
400
bases are held together in "rungs" by
weak hydrogen bonds
500
they made 3D model of DNA
Watson and Crick
500
how do genes/chromosomes control the activity of the cell
they regulate functions of the cell
500
Purines are
double ringed
Adenine & Guanine
500
ligase
joins together fragments
500
DNA polymerase
adds nucleotides