1. Modeling DNA Structure

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3. Activity 10: Modeling DNA Structure Get Started  What do you know about genes?

4. Activity 10: Modeling DNA Structure Introduction  Look closely at the figure underneath the introduction. Read the introduction.

5. Activity 10: Modeling DNA Structure DNA Structure

6. Activity 10: Modeling DNA Structure  What is the molecular structure of DNA? Challenge

7. Activity 10: Modeling DNA Structure Procedure

8. Procedure DNA Nucleotides

9. Activity 10: Modeling DNA Structure Procedure DNA Nucleotides

10. Activity 10: Modeling DNA Structure Hydrogen Bonds

11. Activity 10: Modeling DNA Structure Antiparallel DNA

12. Activity 10: Modeling DNA Structure Double-helix Structure

13. Activity 10: Modeling DNA Structure DNA Images

14. Activity 10: Modeling DNA Structure  The table below shows the number of base pairs in the DNA of selected organisms. From the data in the table, what can you say about the amount of DNA contained in the cells of these three organisms? Analysis 4 Amount of DNA in an Average Cell of Selected Organisms OrganismNumber of Base Pairs E. Coli4.7 million Corn (Zea mays)2.5 billion Human (Homo sapiens)3.3 billion

15. Activity 10: Modeling DNA Structure  What is the molecular structure of DNA? Revisit the Challenge

16. Activity 10: Modeling DNA Structure  base pair  double helix  deoxyribonucleic acid (DNA)  hydrogen bond  nucleotide  sugar-phosphate backbone Key Vocabulary