SAQ for chapter 4. 1. What are the characteristics of enzymes in terms of promot
ID: 3519569 • Letter: S
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SAQ for chapter 4. 1. What are the characteristics of enzymes in terms of promoting physiologic reactions? 2. What is the mechanism by which enzymes promote chemical reactions? 3. Compare and contrast lock and key and induced fit models of enzyme activity. 4. What are isoforms? Why can they be used for diagnostic purposes? How do they relate to cell 5. What are the factors that affect enzyme activity? specific secretion and the environment in which they are secreted? 6. What is the overlap between cofactors and coenzymes? 7. What effects can phosphorylation have on enzyme activity? 80 0 8. What is the relationship of allosteric and substrate inhibition? SAQ, chapter 5. 1. What are the "g words"? How do each relate to energy metabolism and disease lee states? 2. Compare and contrast aerobic versus anaerobic respiration. What are the primary energy sources for skeletal muscle, brain, other tissues/cells? How does this relate to presence of cellular organelles? 3. Why is the lactic acid pathway particularly important for skeletal muscle? 4. When considering energy pathways in cells, why are some organs/cells better at providing energy and the ability to utilize energy containing substrates? How does this relate to the enzymes available to the individual cells and regulation of enzyme activity in those cells? 5. I love the Cori cycle. Usage of a potential waste product to provide energy to other organs/cells. What is it? Where does it occur? 6. What are the preferred energy sources of the body? How are they used? Priority? When depleted, where does energy come from if you don't take in sufficient calories to meet metabolic need? What are the potential consequences? SAQ for signal transduction. 1. What are the potential components of signal transduction pathways (agonist, receptor, etc). Which components are present for each of the individual categories of receptors presented? 2. What is an antagonist? How do they affect signal transduction?Explanation / Answer
1. Enzymes speed up reactions without their structures getting changed. All enzymes are proteins and their structure consists of chains of amino acids. Enzymes reduce activation energy to start a reaction. Enzymes have specific shape and have active sites in which substrates fit. This catalyses the reaction.
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