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homework BIS 103 lecture 02

homework BIS 103 lecture 02 - 3 Reducing sugars fall into...

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1. Consider the following set of half reactions and their reduction potentials: NAD + + 2H + + 2e - NADH + H + E ° ’ = -0.32 V O 2 + 4H + + 4e- 2H 2 O E ° ’ = +0.82 V a. Write the net reaction for the oxidation of NADH and Reduction of molecular oxygen. b. Calculate the change in standard reduction potential, Δ E ° ’. c. Using the Nernst Equation, calculate Δ G ° ’ for this reaction. 2. Draw the structure of D-glucose in both a Fischer projection and Hayworth projection. Draw Fischer projections of D-mannose and D-galactose. What do you notice about the structures of these three sugars? How do they differ?
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Unformatted text preview: 3. Reducing sugars fall into two broad categories: Aldose and Ketose. Explain the difference between the two and give an example of each 4. Draw the structures of the following compounds that play a large role in metabolism: a. Glyceraldehyde b. Dihydroxyacetone c. Pyruvate 5. What does ΔG tell you about a reaction? How do enzymes then help with the reaction? 6. A. What is the name of this molecule B. This is an energy rich molecule, circle the energy rich bond 7. Below are two different structures which one is an aldose and which one is a ketose...
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