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Modeling DNA
Name________________________________________ Date_____/_____/_____ Period______ Use pages 291-­299 to complete this assignment In the space to the right, create a ᷿model of a DNA molecule using the materials provided by your teacher. Label the following parts of your DNA molecule: Sugar-­phosphate backbone, adenine, thyamine, guanine, cytosine, hydrogen bond When you have completed your model have it checked by your teacher. Bonus: Your DNA model holds its double-­helix shape, without your intervention, when your teacher comes to check it. _____________________ Teacher initial When your model has been checked: ● Draw a labeled model in the space ● Eliminate your model’s evidence. ______________________________________________________________________________ Answer these questions, in complete sentences, using the textbook. 1.
What is a nucleotide? What are the parts of a nucleotide? 2.
Why was the work of Rosalind Franklin so important to the research of Watson and Crick? 3.
What are the nitrogenous base “pairs? ______________________________________ -­ ______________________________________ ______________________________________ -­ ______________________________________ 4.
What elements of CHNOPS are found in DNA? 5.
In the table below draw an example of how a prokaryotic cell stores its DNA, and how a eukaryotic cell stores its DNA. Prokaryote Eukaryote 6.
Explain the relationship between chromosomes and DNA? 7.
How does the DNA in a bacteria differ from the DNA in a human? How could you have predicted these differences based on what you know about humans, and bacteria? 8.
Explain the role of the enzyme DNA polymerase in DNA replication? 9.
Why is the number of Adenine molecules, in a DNA strand, always equal to the number or Thymine molecules in a DNA strand?