1. Review DNA

2. Carbohydrates Proteins Lipids Nucleic acids nucleic acid
What are the four major classes
of macromolecules?
Carbohydrates
Proteins
Lipids
Nucleic acids
nucleic acid
DNA is a ________________ ?

3. DNA RNA What are two types of nucleic acids:
__________ or deoxyribonucleic acid
__________ or ribonucleic acid
DNA
RNA

4. DNA What are the monomers (repeating units)
in DNA? ______________________
nucleotides
nucleotide
nucleotide
nucleotide
nucleotide
nucleotide
nucleotide
DNA

5. P Base What are the three parts of a nucleotide? A Phosphate group
A Sugar
A Base
A NUCLEOTIDE P
Base
Sugar

6. What is this?
A NUCLEOTIDE ?
base
phosphate ? ?
sugar

7. four P Base A NUCLEOTIDE Sugar
How many different nucleotides are there in DNA?
four
How do they differ?
A NUCLEOTIDE
They
differ
In their base P
Base
Sugar

8. What are four different bases in DNA?C G

9. Four different nucleotides
They differ in their base!!! P P
Adenine
Thymine
Sugar
Sugar
The language of DNA consists of only four letters!
Imagine that!!! P P
Cytosine
Guanine
Sugar
Sugar

10. Describe DNA
DNA consists of
two complementary strands of nucleotides
shaped like a double helix
the sides or backbone are made
of phosphate and sugar
and the inside is made of two bases
A --- T
C --- G

12. How do the bases pair up?
A --- T C --- G

13. DNA
What is this a molecule of? __________

14. base A nucleotide What molecule is this? ________________ phosphate ?
sugar ?

15. What is this a molecule of? __________ DNA
nucleotide
phosphate
sugar
hydrogen
bonds
base
nucleotide
What is this a molecule of? __________
DNA

16. What is the complementary strand of the DNA strand below:
A C A G T T G C A A G T C C G T G T C A

17. A C A G T T G C A A G T C C G T G T C A A C G T T C A G G C
Determine the other complementary strand
of the DNA strand below.
A C A G T T G C A A G T C C G
T G T C A A C G T T C A G G C

18. What is the duplicating or copying of DNA called?
One DNA
What is the duplicating
or copying of DNA
called? 1
DNA replication. 1 2
Two DNA

19. Where in the cells does DNA replication occur?
In the nucleus

20. When is DNA replicated?
During interphase

21. DNA replication occurs during interphase before….
before a cell divides

22. for growth and development.
Why do cells divide?
To replace old or dead cells
To replace cells destroyed by injury
for growth and development.
For asexual reproduction

23. The steps in DNA replication:
1. An enzyme unzips the double helix,
separating the two strands.

24. 2. DNA polymerase (an enzyme) attaches
free-floating nucleotides, one by one,
to the exposed bases on each strand.
Exposed bases
Free nucleotide

25. One DNA 1
3. The result is
two identical
DNA molecules. 1 2
Two DNA

26. What is this process called?
DNA REPLICATION

27. What is this process called?
DNA REPLICATION

28. What is this process called?
DNA REPLICATION

29. What is this process called?
DNA REPLICATION

30. What is this process called?
DNA REPLICATION