EP MICROBIOLOGY:W/DISEASES BY..-MOD.ACC
5th Edition
ISBN: 9780134607894
Author: BAUMAN
Publisher: PEARSON CO
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Chapter 5, Problem 6TMW
Why is feedback inhibition necessary for controlling anabolic pathways?
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What is something that allosteric effectors that alter the rate of catabolic or anabolic pathways have in common?
Inhibitors of acetylcholinesterase, such as edrophonium, are used to treat Alzheimer’s disease. The substrate for acetylcholinesterase is acetylcholine. Structures are attached.
What kind of inhibitor is edrophonium? Explain.
Can inhibition by edrophonium be overcome in vitro by increasing the substrate concentration? Explain.
Does this inhibitor bind reversibly or irreversibly to the enzyme? Explain.
What are the cellular advantages to feedback inhibition?
Chapter 5 Solutions
EP MICROBIOLOGY:W/DISEASES BY..-MOD.ACC
Ch. 5 - How can oxidation take place in an anaerobic...Ch. 5 - Why do electrons carried by NADH allow for...Ch. 5 - Why does catabolism of amino acids for energy...Ch. 5 - An uninformed student describes the Calvin-Benson...Ch. 5 - Prob. 5TMWCh. 5 - Why is feedback inhibition necessary for...Ch. 5 - Breaks a large molecule into smaller ones a....Ch. 5 - Includes dehydration synthesis reactions a....Ch. 5 - Prob. 3MCCh. 5 - Prob. 4MC
Ch. 5 - Involves the production of cell membrane...Ch. 5 - Includes hydrolytic reactions a. anabolism only b....Ch. 5 - Includes metabolism a. anabolism only b. both...Ch. 5 - Prob. 8MCCh. 5 - A reduced molecule _________. a. has gained...Ch. 5 - Prob. 10MCCh. 5 - Coenzymes are ________. a. types of apoenzymes b....Ch. 5 - Which of the following statements best describes...Ch. 5 - Which of the following does not affect the...Ch. 5 - Most oxidation reactions in bacteria involve the...Ch. 5 - Under ideal conditions, the fermentation of one...Ch. 5 - Under ideal conditions, the complete aerobic...Ch. 5 - Which of the following statements about the...Ch. 5 - Reactions involved in the light-independent...Ch. 5 - The glycolysis pathway is basically __________. a....Ch. 5 - A major difference between anaerobic respiration...Ch. 5 - 1. _______ Occurs when energy from a compound...Ch. 5 - Fill in the Blanks 1. The final electron acceptor...Ch. 5 - Fill in the Blanks 2. Two ATP molecules are used...Ch. 5 - Fill in the Blanks 3. The initial catabolism of...Ch. 5 - Fill in the Blanks 4. ________ is a cyclic series...Ch. 5 - Fill in the Blanks 5. The final electron acceptor...Ch. 5 - Fill in the Blanks 6. Three common inorganic...Ch. 5 - Fill in the Blanks 7. Anaerobic respiration...Ch. 5 - Fill in the Blanks 8. Complete the following...Ch. 5 - Prob. 9FIBCh. 5 - Fill in the Blanks 10 The main coenzymes that...Ch. 5 - VISUALIZE IT! 1 Label the mitochondrion to...Ch. 5 - Label the diagram below to indicate acetyl-CoA,...Ch. 5 - Examine the biosynthetic pathway for the...Ch. 5 - Prob. 1SACh. 5 - Why we enzymes necessary for anabolic reactions to...Ch. 5 - How do organisms control the rate of metabolic...Ch. 5 - How does a nor-competitive inhibitor at a single...Ch. 5 - Explain the mechanism of negative feedback with...Ch. 5 - Facultative anaerobes can live under either...Ch. 5 - How does oxidation of a molecule occur without...Ch. 5 - List at least four groups of microorganisms that...Ch. 5 - Why do we breathe oxygen and give of carbon...Ch. 5 - Why do cyanobacteria and algae take in carbon...Ch. 5 - What happens to the carbon atoms in sugar...Ch. 5 - How do yeast cells make alcohol and cause bread to...Ch. 5 - Where specifically does the most significant...Ch. 5 - Why are vitamins essential metabolic factors for...Ch. 5 - A laboratory scientist notices that a cer1ain...Ch. 5 - Arsenic is a poison that exists in two states in...Ch. 5 - Explain why an excess of all three of the amino...Ch. 5 - Why might an organism that uses glycolysis and the...Ch. 5 - Describe how bacterial fermentation causes milk to...Ch. 5 - Giardia intestinalis and Entamoeba histolytica are...Ch. 5 - Two cultures of a facultative anaerobe are grown...Ch. 5 - What is the maximum number of molecules of ATP...Ch. 5 - In terms of its effects on human metabolism, why...Ch. 5 - Cyanide is a potent poison because it irreversibly...Ch. 5 - How are photophosphorylation and oxidative...Ch. 5 - Members of the pathogenic bacterial genus...Ch. 5 - Compare and contrast aerobic respiration,...Ch. 5 - Scientists estimate that up to one-third of Earths...Ch. 5 - A young student was troubled by the idea that a...Ch. 5 - If a bacterium uses beta-oxidation to catabolize a...Ch. 5 - Some desert rodents rarely have water to drink....Ch. 5 - Prob. 17CTCh. 5 - We have examined the total ATP, NADH, and FADH2...Ch. 5 - Explain why hyperthermophiles do not cause disease...Ch. 5 - In addition to extremes in temperature and pH,...Ch. 5 - Figure 5.18b illustrates events in aerobic...Ch. 5 - Suppose you could insert a tiny pH probe into the...Ch. 5 - Even though Pseudomonas aeruginosa and...Ch. 5 - Photosynthetic organisms are rarely pathogenic....Ch. 5 - Prob. 25CTCh. 5 - A scientist moves a green plant grown in sunlight...Ch. 5 - What class of enzyme is involved in amination...Ch. 5 - Using the following terms, fill in the following...
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- What is the significance of the fact that regulatory enzymes often are located at pathway branch points? What are isoenzymes, and why are they important in pathway regulation?arrow_forwardIdentify the following statements as true or false. If a statement is false, explain what is wrong with that statement a) Transition state analogs bind very tightly with the enzyme active site as they form covalent bonds with the active site b) Receptor desensitization happens upon prolonged exposure of receptors to both agonists and antagonists c) Dactinomycin and Doxorubicin are examples of drugs that bind with the major groove of DNA d) Mitomycin C forms interstrand crosslinking while cisplatin forms intrastrand crosslinking of DNAarrow_forwardHow does the interaction between allosteric and covalent modulation result?arrow_forward
- why is non-competitive inhibiton a special type of mixed inhibiton?arrow_forwardDifferent Types of Regulation require by Catabolic and Anabolic Pathways?arrow_forwardWhy is Methotrexate used in chemotherapy? How does it work in terms of enzyme inhibition that is involved in its mechanism action?arrow_forward
- What is the major activator (non-allosteric, direct-activator) of phosphorylase? How does this activator activate phosphorylase (type of regulation)?arrow_forwardWhat is the likely function of the cytosolic cAMP in this transduction pathway? Question 16 options: a) It is a competitive inhibitor of the protein kinase. b) It is a hormone. c) It is a messenger RNA. d) It is a coenzyme. e) It is a second messenger.arrow_forwardDoes the behavior of allosteric enzymes become more or less cooperative in the presence of inhibitors?arrow_forward
- Draw a mechanism using the general features of a serine protease to explain how inhibitor x might work using the following information: inhibitor x is a representative of a new family of serine protease inhibitors. treatment of chymotrypsin with inhibitor X rapidly decreased activity. to determine the mode of inhibition the researchers used dialysis to exchange the buffer with buffer lacking free inhibitor x. after dialysis, the enzyme did NOT recover any activity.arrow_forwardThe nerve gas sarin acts as a poison by covalently bonding to a hydroxyl group in the active site of the enzyme acetylcholinesterase. This binding results in a higher-than-normal amount of acetylcholine at a nerve synapse, resulting in muscle spasms. From this description, would you expect sarin to be a competitive, noncompetitive, or irreversible inhibitor? noncompetitive inhibitor irreversible inhibitor competitive inhibitorarrow_forwardHow can you decrease (or stop) the rate of binding for a noncompetitive inhibitor? Could you change the receptor allosteric sites to prevent noncompetitive binding?arrow_forward
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