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HomeWork 3 s13

Atmospheric nitrogen a c d b e 7a in the symbiotic

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Atmospheric Nitrogen a. c. d. b. e.
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7a. In the symbiotic nitrogen fixing rhizobium bacteria the enzyme complex _________________ is destroyed by oxygen, the protein __________________ carries oxygen, and the enzyme complex _____________________ catalyzes the reaction in which oxygen and protons are converted into ________. 7b. (3 points) Which of the proteins/protein complexes above has the highest affinity for oxygen? Which has the least? 7c. (2 points) Which of these proteins or protein complexes is/are MADE by the bacteria? Animal Nutrition 8. Please fill in the table. The perfect answer will have some boxes left blank. This is about the digestion of a single class of macromolecule. Make sure you fill in the boxes that indicate the substrate and product of every enzyme you include. WHERE SUBSTRATE(S) ENZYME(S) PRODUCT(S) Fingers Mouth Stomach S.I. Lumen disaccharides At surface of Brush Border cells 9. Sketch the digestion of proteins in the small intestine. Include and label all enzymes involved, their substrates and products. 10a. Sketch the process of fat emulsification by bile. Make sure amphipathic entities are indicated. 10b. What are the substrates and products of Lipase?
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11. How do animals keep protein-digesting enzymes which function in the digestive system from destroying the cells that make them? Answer for both enzymes that function in the stomach and those that function in the small intestine 12. What is a trans-fat? 13. What is the difference between an omega 3 and an omega 6 fatty acid? 14. How does the cholera toxin cause diarrhea? Sketch a brush border cell to illustrate your answer. Include the toxin, all of the channels, co-transporters and enzymes and signaling molecules involved.
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