Journal: Describe how DNA is
replicated
Q. What is the shape of DNA?
A. Double Helix
Q. What is the “backbone” of
DNA
A. Sugar and phosphates
Q. What is the product of DNA
replication?
A. Two Identical daughter
strands
Q. What does DNA polymerase
do?
A. Adds the nitrogen bases &
proof reads the DNA sequences
Q. Why must DNA replicate?
A. growth and cell division
Q. What is the name of the bond
that holds one base to another
base, forming the “rungs” of the
DNA ladder?
hydrogen
bond
What is a vaccine?
a harmless version of a diseasecausing microbe
What does a vaccine do?
Causes an immune response…
The body will make antibodies to
fight the microbe
Q: What is a bacteriophage?
Virus that infects bacteria
Q: When does DNA replication
occur?
During the Synthesis (S) phase of
Interphase
What is a replication fork?
Half of a replication bubble, where
the DNA seperates.
What is DNA made of?
Nucleotides
What are the three parts of a
nucleotide?
Phosphate group, Sugar
(deoxyribose), & nitrogen base
What does DNA stand for?
Deoxyribonucleic acid
What is DNA named after?
Deoxyribose (sugar)
There are two different groups of
nitrogen bases what are they?
Purines and Pyrimidines
How many rings do purines
have?
Two
How many rings do pyrimidines
have?
1 ring
Which nitrogen bases are
purines?
Adenine and guanine
Which are pyrimidines?
Thymine and Cytosine
Amount of A= amount of ___
T
If the parent strand reads
AGCTCCGATT what will the
complimentary strand read?
TCGAGGCTAA
What is the enzyme that
unwinds/unzips the DNA?
Helicase
What enzyme adds the nitrogen
bases?
DNA polymerase
Where does the energy for DNA
replication come from?
When a nucleotide joins the strand,
phosphate groups are broken off
What are the steps of DNA
replication?
DNA unwinds, hydrogen bonds break,
replication bubbles form, bubble grow
together, two identical strands formed.
What are the base pairing rules?
A-T, G-C
What is a mutation?
Change in nucleotide sequence
What enzyme proofreads the
DNA and can fix mistakes?
DNA polymerase