Download DNA

Wilkins
Crick
Watson
Franklin
nucleotide
• The offspring have Why
copies
do
of the parents’
offspring
chromosomes
resemble
theirsets
• Chromosomes contain
parents?
of instructions
• Those instructions are
called GENES
• Genes are made up of
DNA
In what year was DNA finally
concluded to be genetic
material?
•1944
HINT: D-Day: This is the U.S.
Coast Guard at Normandy
•Phosphate
5-carbon
sugar
molecule
(deoxyribose)
the three
parts of a
NUCLEOTIDE • Nitrogen base
?
The letters DNA stand for what
words?
•Deoxyribonucleic
•acid
4 different NITROGEN bases
•Adenine
•Thymine
•Guanine
•cytosine
Class of organic molecules for
ADENINE and GUANINE
•purines
LARGE
Class of organic molecules for
thymine and cytosine
•pyrimidines
SMALL
Purines have how many rings of
carbon and nitrogen atoms?
•2
Pyrimidines have how many
rings of carbon and nitrogen
atoms?
•1
Base-pairing rule
•Thymine always goes
with Adenine
•Cytosine always goes
with Guanine
3 scientists who won the Nobel Prize by
understanding the 3-deminsional
structure of DNA
•Watson,
Crick
and
Wilkins
1953………Nobel Prize in 1962
Rosalind Franklin
Only males
were allowed
in the
university
dining rooms,
and after hours
Franklin's
colleagues
went to menonly pubs.
Describe a
double helix
Spiral staircase
In the DNA structure of
the ‘twisted ladder’
(spiral staircase) the
rungs are held
together by what
bond?
•HYDROGEN
The process of making a new
DNA strand is called
•REPLICATION
Before REPLICATION can begin
•The double
helix must be
UNWOUND
The UNWINDING
of the DNA strand is
accomplished by
•ENZYMES
• HELICASES
called
Differences between
DNA and RNA
DNA
RNA
2 strands of
nucleotides
5-carbon sugar
deoxyribose
(‘de’ means
without an OH)
thymine
Single strand of
nucleotides
5-Carbon ribose
(sugar)
Uracil
Now you try it
Draw 5 pairs of nucleotides,
labeling each part.