Catalyst: Think-pair-share

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

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

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.

(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

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

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

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

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

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

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

-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

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

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

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

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

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

A T G C T A C G C G

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

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

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

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

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

Homework DNA structure worksheet