1. DNA Structure & Replication
AP Biology
DNA Structure & Replication

2. Nucleic Acid Structure

3. Complimentary Base Pairing

4. S Phase of Cell Cycle

5. Theta Replication in Prokaryotes
Replication fork
Origin of
replication
Termination
of replication

6. Linear Replication in Eukaryotes

7. The parent molecule has two complementary .
The parent molecule has
two complementary
strands of DNA. Each base is paired by hydrogen bonding with its specific partner, A with T and G with C.

8. The parent molecule has two complementary .
The parent molecule has
two complementary
strands of DNA. Each base is paired by hydrogen bonding with its specific partner, A with T and G with C.
The first step in replication is separation of the two DNA strands.

9. Semi Conservative process of DNA Replication
The parent molecule has
two complementary
strands of DNA. Each base is paired by hydrogen bonding with its specific partner, A with T and G with C.
The first step in replication is separation of the two DNA strands.
Each parental strand now serves as a template that determines the order of nucleotides along a new, complementary strand.

10. Origins and Replication bubbles

11. DNA Replication

12. DNA Replication by adding Nucleosides on the 3’ end
New strand
Template strand
5¢ end
3¢ end
5¢ end
3¢ end
Sugar
Base
Phosphate
DNA polymerase
3¢ end
3¢ end
Pyrophosphate
Nucleoside
triphosphate
5¢ end
5¢ end

13. 5 Carbon Sugar Important Parts (It could be DNA or RNA)

14. Helicase is the GREEN “blob”

15. RNA Primer (Remember, RNA is temporary)

16. DNA polymerase Pyrophosphate Nucleoside triphosphate.
New strand
Template strand
5¢ end
3¢ end
5¢ end
3¢ end
Sugar
Base
Phosphate
DNA polymerase
3¢ end
3¢ end
Pyrophosphate
Nucleoside
triphosphate
5¢ end
5¢ end

17. Nucleotide Excision Repair

18. Telomere Removal at the Chromosome Ends5¢
End of parental
DNA strands
Leading strand
Lagging strand 3¢
Last fragment
Previous fragment
RNA primer
Lagging strand 5¢ 3¢
Primer removed but
cannot be replaced
with DNA because
no 3¢ end available
for DNA polymerase
Removal of primers and
replacement with DNA
where a 3¢ end is available 5¢ 3¢
Second round
of replication 5¢
New leading strand 3¢
New leading strand 5¢ 3¢
Further rounds
of replication
Shorter and shorter
daughter molecules

19. Apoptosis in the hand