1. Catalyst: Think-pair-share

2. Catalyst Number 12 in your packet. (on page 12)
Write the question, draw the picture, and answer the question.

3. Announcements Today is LAST DAY to make up Unit 5 exam.
If you didn’t take Unit 6 (last Thursday) COME MAKE IT UP!!!
Opinion/Summary essay

4. SWBAT explain the structure of a nucleotide and the overall structure of a strand of DNA. SWBAT describe the structure of a nucleotide and the overall structure of a strand of DNA.

5. (De-oxy-ribo-nucleic acid)
DNA
DNA = Deoxyribonucleic Acid
(De-oxy-ribo-nucleic acid)
Watson and Crick built a model of DNA based on previous research

6. DNA Where is DNA found? In the NUCLEUS of all our cells
What does DNA do?
Stores genetic information
Replicates/copies itself
Provides a code to make proteins

7. 1. A ____________ is a coiled piece of DNA
2. DNA (Deoxyribonucleic acid) controls the production of _________.
3. _________ are the building blocks of an organism. These proteins determine how we look since they make up our skin, hair, and parts of individual cells.
4. It is the ____________ of DNA which determines what proteins are made.
chromosome
Proteins
Proteins
sequence

8. 5. DNA is made up of ________, which code for a particular protein
genes
5. DNA is made up of ________, which code for a particular protein
6. These different proteins code for _________
traits

9. How are traits, genes, DNA and chromosomes all related?
Proteins code for traits
Traits make up genes
Genes make up DNA
DNA coils into chromosomes
______  _____  _____ ___ _______
Proteins
traits
genes
DNA
chromosomes

10. What does DNA look like?
7. DNA is in the shape of a _____________ (It looks like a twisted ladder)
Double Helix

11. 7. The backbone of the double helix ladder are made of _______ and __________
Phosphate
Sugar

12. -The sides of the ladder are made up of phosphate and sugar
-The sides of the ladder are made up of phosphate and sugar. The steps on the ladder are made up of nitrogen bases attached to each other by hydrogen bonds.
Nitrogen Base
Phosphate
Sugar
Hydrogen Bond

13. These sides are called nucleotides.
Nucleotides consist of:
A phosphate molecule
A nitrogenous base
Deoxyribose sugar molecule

15. 9. The rungs of the ladder are made of ______
10. There are ______ bases
Nitrogen bases
four
1. Adenine
2. Thymine
3. Guanine
4. Cytosine

16. Purines vs. Pyrimidines
Purines are double ringed bases: guanine and adenine
Pyrimidines are single ringed bases: thymine and cytosine

17. _________ and _______ ALWAYS pair together
Adenine
Thymine
_________ and _______ ALWAYS pair together
________ and ________ ALWAYS pair together
Guanine
Cytosine

18. Check for Understanding
If one section of a strand of DNA has the base sequence A-G-A-T-T-C, what is the base sequence on the other strand?
T-C-T-A-A-G

19. A T G C T A C G C G

20. Fun Fact
If the DNA from every cell in your body was stretched out to its full length, and all the strands joined together, how far would it stretch?
200 times from the earth to the sun and back

21. Make a MODEL of DNA!
We will be using colored marshmallows and toothpicks to create models of DNA
Work with your group (of 3)
Stay seated at all times
Keep materials on the desk

22. Handout Read through the steps together. CFU:
Marshmallows represent what?
Licorice represents what?
How do you attach the base to the DNA ladder?

23. Creating a model Yellow = Adenine Green = Thymine Pink = Guanine
Orange = Cytosine

24. Tracking Mastery
While we do our edible DNA, you will be placing your mastery stickers on our tracking posters.
Call up one by one;

25. Homework
DNA structure worksheet