1. DNA Ch 12.1

2. Find the following answers:
What is this chapter about?
Name the 2 nucleic acids in chapter 12.
How is DNA different from RNA?
What are the 4 bases in DNA?
What are the 4 bases in RNA?
How are the bases different?
How many types of RNA are there?
Name them.
What is the full name for DNA? RNA?
Give a definition for Duplication = Replication
Which nucleic acid can duplicate?
Describe what you see in Protein Systhesis

3. 1) Recognize the structure of DNA
a) I will write what DNA stands for
b) I will describe
what “double helix” means
c) I will list the parts of the sides of the DNA molecule
d) I will
list the nitrogen bases in DNA
Say what they are attached to on the sides
Pair them correctly

4. What is the name of DNA?
Deoxyribo-Nucleic Acid

5. DNA Structure: Double Helix or Twisted Ladder
Rungs of ladder
Nitrogen bases attach to the sugars:
ADENINE
THYMINE
GUANINE
CYTOSINE
Sides of ladder
Phosphate
Sugar
Building block
Phosphate, sugar &
nitrogen base
Called a NUCLEOTIDE

6. What are the building blocks of DNA?
What is a nucleotide made of?
Nucleotides
Phosphate
Sugar
Nitrogen base
Rungs of the ladder
Sides of the ladder

7. What is Base Pairing? When bases match specifically: Adenine Thymine
Guanine Cytosine

9. Is there anything special about the DNA Sugar?
It is missing an oxygen - De oxy
DNA RNA

10. Who discovered DNA? Watson & Crick, 1952 They called it a Double Helix
2 strands are wound around each other
They made 3-D models with wire and wood.
Based on the photographs of Rosiland Franklin

11. Hydrogen bonds hold the bases together
2 between A and T
3 between G and C

13. TODAY
TAKE OUT SHEET OF PAPER.
# 1-10
USE A PEN ONLY

14. Think-Write-Pair-Share
List 10 facts learned about DNA:
The name is Deoxyribo-Nucleic Acid
The shape is a double helix or twisted ladder
The building block is called a nucleotide
Nucleotides are made of:
Phosphate
Sugar
Nitrogen base
Double helix sides are phosphate and sugar
Double helix rungs are nitrogen bases
Adenine matches with Thymine
Guanine matches with Cytosine
DNA’s sugar is missing an oxygen
DNA was discovered by Watson & Crick
The bases are held together by hydrogen bonds

15. Describe Watson and Crick’s model of the DNA molecule.
What are the 4 kinds of bases in DNA?
3. Describe the components and structure of a DNA nucleotide.
4. What is meant by the term base pairing?

16. HOT Questions Match the following to their partners:
Adenine -
Guanine -
Describe the shape of a DNA molecule
Illustrate the structure of a nucleotide
Make a diagram of a DNA molecule and label the sides and rungs of the “ladder”
Show the number of hydrogen bonds between the nitrogen bases
Support with example (picture) how the DNA sugar is different from the sugar in RNA.

17. 1 Lab Report for 2 people Title Purpose Hypothesis Materials Procedure
Observation
Conclusion
Questions
What is the shape of DNA?
Name the 4 bases and how they are paired.
What are the sides of the DNA molecule made of?
What are the rungs of the DNA ladder made of?
What holds the bases together?