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BMEN 289 hw 3 quest

BMEN 289 hw 3 quest - BMEN 289 Engineering Biology...

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BMEN 289 Engineering Biology Homework #3 Due Sept. 20 th (Thursday) Carefully read each question. Provide answers which specifically address the questions and demonstrate your understanding of the class/textbook material. You must explain your answers to receive full credit. 1 1. Consider the forces that hold a DNA molecule together (15 pts) . 1 a. What types of molecular interactions stabilize double stranded DNA? For each type of interaction indicate specifically where in the molecule it is acting on. 2 b. The plot illustrates how the melting temperature of DNA varies as a function of the percentage of guanine-cytosine base pairs in a segment of double-stranded DNA. Explain why T m increases as the percentage of guanine-cytosine base pairs increases in a segment of double-stranded DNA. 2 2. A peptide has been isolated with the following amino acid sequence: NH 3 + -Val-His-Asp-Gly-Phe-Arg-COO - Using the attached list of pK a values, calculate the net charge for this peptide
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