DNA Activity 1225777 PDF

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assignments and notes for two subjects...

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Name ______________________________________ Date_________ Block_________ DNA Structure 1. What do the letters DNA stand for? ________________________________________________________________ 2. Two scientists are given credit for discovering the structure of DNA. What are the names of those two scientists? A. ____________________________________ B. _____________________________________ 3. DNA is a polymer, which means that it is made up of many repeating single units called monomers. What are the monomers called? ______________________________________________________ 4. The “backbone” of the DNA molecule is made up of what two components? A. ____________________________________ B. _____________________________________ 5. There are four different variations of these monomers (four different bases), what are the names of these bases? A. ____________________________________ B. _____________________________________ C. ____________________________________ D. _____________________________________ 6. These bases are of two different types of molecules: purines and pyrimidines. Purines have __________________ ring(s) in their structure, and pyrimidines have __________________ ring(s) in their structure. 7. The two bases that are purines are: A. ____________________________________ B. _____________________________________ 8. The two bases that are pyrimidines are: A. ____________________________________ B. _____________________________________ 9. Chargaff’s rule states that the DNA of any species contains equal amounts of __________________ and __________________ and also equal amounts of __________________ and __________________ 10. Based on this information, scientists could predict that the base __________________ pairs with __________________ and the base __________________ pairs with __________________ in the formation of the DNA molecule. 11. Franklin and Wilkins studied the structure of DNA using __________________, a technique to examine molecules, and helped Watson and Crick to determine that the shape of the molecule was a __________________ __________________. 12. Write the complementary sequence to the following DNA strand: A A T T C G C C G G T A T T A G A C G T T

Name ______________________________________ Date_________ Block_________ 13. Draw the basic structure of a nucleotide with its three parts. Label them.

Label the following: Hydrogen bonds, nitrogen bases, phosphate group, deoxyribose sugar, sugarphosphate backbone

Label the following: Original DNA strand, DNA Polymerase (2x), Free Nucleotides, Replication fork, Helicase, chromosome...