1. Create a simile for DNA. 2. Who were the three scientists involved with the discovery of the structure of DNA? 3. What is the technique utilized to uncover the structure of DNA? 4. Why is DNA stored in the 4/10 Daily Catalyst Pg. 48 DNA Structure
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1. Create a simile for DNA. 2. Who were the three scientists involved with the discovery of the structure of DNA? 3. What is the technique utilized.
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1. Create a simile for DNA. 2. Who were the three scientists
involved with the discovery of the structure of DNA?
3. What is the technique utilized to uncover the structure of DNA?
4. Why is DNA stored in the nucleus?
4/10 Daily Catalyst Pg. 48 DNA Structure
Quiz #11 on Friday Intro to DNA
Unit 4 Extra Credit due Monday, April 13thFind an article on genetics or genetic disease and write a half page summary/opinion on the article. Print out the article and staple your half sheet to the article. Quiz #12 next Friday DNA test 4/21
4/10 Class Business Pg. 48 DNA Structure
Daily Catalyst
Class Business
Objective
DNA structure notes
Quiz #11 DNA
4/10 Agenda Pg. 48 DNA Structure
We will be able to construct scientific explanations that use the structures and
mechanisms of DNA and RNA to support the claim that DNA and, in some cases, that RNA
are the sources of heritable information.
4/10 Objective
Who discovered the structure of DNA? What is the structure of DNA?
How does the structure of DNA relate to its function?
How does the structure of DNA allow DNA to be the source of heritable information?
Every nucleotide has 1 base, but there are 4 to choose from:4 nitrogenous basesA,T,C, & G
The bases
Phosphate
Sugar
Bases
Key Point #4: The backbone is made up of _________ and ___________.
Phosphodiester bonds hold the backbone together.Strong, covalent bond
SUGAR
PHOSPHATE
The middle of the ladder are the bases. The bases are held together by _________ bonds.
Key Point #5:
HYDROGEN
The two sides of the “ladder” are held together by the hydrogen bonds between the bases.
The bases are sooo picky and will only pair up with a certain base.
Key Point #6: Complementary Base Pairing:
A-- T
C-- G
Complementary Base Pairing
In 1953 Watson, Crick, and Franklin discovered DNA had the shape of a double helix.
The DNA is a double helix Double: two strands Helix: twisted.
Examples?
Structure
How does DNA get its twisted shape? KP #7: The hydrogen bonds between the bases
pull so tightly on one another that it causes the DNA to twist!
Key Point #7:
Complementary Base Pairing: A—T C—G
Do not forget!
What are the 4 kinds of bases found in DNA? Thymine (T) Cytosine (C) Adenine (A) Guanine (G)
Describe Watson and Crick’s model of DNA. A double helix
Tell me what ya know!
If a DNA strand has 34 Guanine bases, how many Cytosine's are there? WHY? 34, because all 34 Guanine’s need to pair up
with 34 Cytosine’s
What is the purpose of DNA? To hold our genetic information
Tell me what ya know!
If you have the bases TATGA, what are the correct DNA base pairs? T A T G A A T A C T
G A C C T A G C T G G A T C
Tell me what ya know!
Directions: On page 49 DNA model, create a DNA strand from the pieces given to you. Glue the model to page 49. Color the sugars- red Color the phosphates- green Color the thymine- yellow Color the adenine- blue Color the guanine- purple Color the cytosine- orange
DNA Model
Directions: Silently and independently complete the quiz. Turn your quiz into the basket when you are finished. Time: 10 minutesNoise: 0 (SILENT)
Quiz #11
Directions: Fill in the chart about RNA and DNA on notebook page 50 RNA.