Warm-Up
What holds base pairs together?
________________ holds base pairs together.
Which DNA sequence is complementary to the base
sequence ACCGTAT?
The DNA sequence complementary to ACCGTAT is…
complementary = pairs up with
What holds base pairs together?
1.
2.
3.
4.
hydrogen bonds
covenant bonds
sugar-phosphate backbones
pairs of double-ringed nucleotides
Which DNA sequence is complementary to the base
sequence ACCGTAT?
1.
2.
3.
4.
GTTACGC
UCCGTAT
TGGCATA
CAATGCG
Yesterday’s Picture
UNIT
6
DNA Replication
• DNA Replication is making a copy of DNA.
UNIT
6
DNA Replication
• DNA replication is making a copy of DNA.
• DNA replication is semi-conservative
because the copy is half-old, half-new
UNIT
6
DNA Replication
• DNA replication is making a copy of DNA.
• DNA replication is semi-conservative
because the copy is half-old, half-new
UNIT
6
DNA Replication
• DNA replication is making a copy of DNA.
• DNA replication is semi-conservative
because the copy is half-old, half-new
• Three Steps of Replication:
1. Unzip the hydrogen bonds with helicase.
UNIT
6
DNA Replication
• DNA replication is making a copy of DNA.
• DNA replication is semi-conservative
because the copy is half-old, half-new
• Three Steps of Replication:
1. Unzip the hydrogen bonds with helicase.
UNIT
6
DNA Replication
• DNA replication is making a copy of DNA.
• DNA replication is semi-conservative
because the copy is half-old, half-new
• Three Steps of Replication:
1. Unzip the hydrogen bonds with helicase.
2. Add new nucleotides to complementary
bases with DNA polymerase.
UNIT
6
DNA Replication
• DNA replication is making a copy of DNA.
• DNA replication is semi-conservative
because the copy is half-old, half-new
• Three Steps of Replication:
1. Unzip the hydrogen bonds with helicase.
2. Add new nucleotides to complementary
bases with DNA polymerase.
3. Two new DNA molecules are made.
UNIT
6
Your Objective
Make a Flow Map
At every step, state the enzyme and
the function (remember: enzymes end in –ase).
UNIT
6
Closure
Answer the following question in a
complete sentence:
Why is DNA replication considered to be a
semi-conservative process?
Suggested sentence stem:
I know that DNA replication is a semi-conservative
process because…
Name/Nombre
Date/Fecha
Period ____