Prob set metab key

Prob set metab key - MCB 11 Problem Set 4 Key April 7 2006...

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MCB 11 Problem Set 4 Key April 7, 2006 1. -- NADH- Reduced NAD indicates oxidation has taken place to provide electrons and protons for NAD reduction. ---CO 2 - fully oxidized carbon which originated as C-OH (alcohol level) or >C=O (aldehyde level) carbons of glucose. 2a. niacin--a vitamin that must be eaten because it cannot be synthesized in our bodies. Is converted to coenzyme form NAD to assist in oxidation reactions, picking up the two electrons and protons from the metabolic intermediates that are oxidized, and becoming NADH + H + . b. FAD--coenzyme form of the vitamin riboflavin. Used in oxidation reactions to pick up the two protons and two electrons from oxidized metabolic intermediates to become FADH 2 . Ultimately reoxidized by giving two electrons and two protons to the electron transport chain. 3. Not growing because all carbon ingested is excreted as CO 2 . Intermediate compounds in the pathway need to be diverted to become starting materials for pathways to make amino acids, lipids, carbohydrates for growth.
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