Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 32.3, Problem 2CC
Summary Introduction
To explain:
The negative feedback in thermoregulation differs from feedback inhibition in an enzyme catalyzed biosynthetic process.
Introduction:
Negative feedback occurs when the end product of an enzyme interferes or decreases the effect of the same enzyme that produced it. The feedback inhibition mechanism is the cellular process in which the end product of an enzyme inhibits the production of the same enzyme that produced it. By this process there is the maintenance of the amount of enzyme required. Both processes help in the regulation of the
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MAKE CONNECTIONS Step 3 in Figure 9.9 is a major pointof regulation of glycolysis. The enzyme phosphofructokinaseis allosterically regulated by ATP and related molecules (seeConcept 8.5). Considering the overall result of glycolysis,would you expect ATP to inhibit or stimulate activity of thisenzyme? Explain. (Hint: Make sure you consider the role of ATPas an allosteric regulator, not as a substrate of the enzyme.)
Q1: Why is it important that enzymes are not permanently altered when they bind with substrate molecules? Q2: How would a higher temperature or higher salt concentration make it more difficult for an enzyme to function effectively? Q3: If a cell was unable to produce a particular enzyme necessary for a metabolic pathway, describe how the absence of that enzyme would affect the cell.
Q48
Chapter 32 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 32.1 - What properties do all types of epithelia share?Ch. 32.1 - Prob. 2CCCh. 32.2 - Prob. 1CCCh. 32.2 - Prob. 2CCCh. 32.2 - Prob. 3CCCh. 32.3 - Is it accurate to define homeostasis as a constant...Ch. 32.3 - Prob. 2CCCh. 32.3 - Prob. 3CCCh. 32.4 - What is the function of the filtration step in...Ch. 32.4 - What advantage does uric acid offer as a...
Ch. 32.4 - WHAT IF? A camel standing in the sun requires much...Ch. 32.5 - Prob. 1CCCh. 32.5 - Prob. 2CCCh. 32.5 - WHAT IF? If blood pressure in the afferent...Ch. 32 - The body tissue that consists largely of material...Ch. 32 - Prob. 2TYUCh. 32 - Which process in the nephron is least selective?...Ch. 32 - Homeostasis typically relies on negative feedback...Ch. 32 - Prob. 5TYUCh. 32 - In which of the following species should natural...Ch. 32 - Prob. 7TYUCh. 32 - Prob. 8TYUCh. 32 - Prob. 9TYUCh. 32 - Prob. 10TYUCh. 32 - FOCUS ON ORGANIZATION In a short essay (100-150...Ch. 32 - SYNTHESIZE YOUR KNOWLEDGE These macaques (Macaca...
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- Chapter : Lipid metabolism Triasilgliserol (TAG) is stored in adipose tissue in the form of lipoproteins that will circulate in the blood plasma. By the time TAG reaches the adipose network, it will be hydrolyzed. Explain: a. TAG hydrolysis reaction b. regulation of storage and use of lipids in the animal's bodyarrow_forwardVmax for an enzyme-catalyzed reaction: A)is twice the rate observed when the concentration of substrate is equal to Km. B)is unchanged in the presence of a noncompetitive inhibitor. C)generally increases when pH increases. D)increases in the presence of a competitive inhibitor. E)is limited only by the amount of substrate supplied.arrow_forwardName two important outcomes of catabolism?arrow_forward
- Q2: What is the maximum initial reaction rate for this enzyme at pH 7?arrow_forwardVmax for an enzyme-catalyzed reaction: A) generally increases when pH increases. B) is limited only by the amount of substrate supplied. C) is twice the rate observed when the concentration of substrate is equal to the Km. D) is unchanged in the presence of a uncompetitive inhibitor. E) increases in the presence of a competitive inhibitor.arrow_forwardAsap explain wellarrow_forward
- plz explain in details. Organisms must do tasks in order to survive. This work requires either light for photosynthesis or the chemical potential energy of organic molecules as an energy input. Explain the necessity for energy in living organisms and provide two (2) examples. Explain the oxidative phosphorylation process, particularly the involvement of oxygen. Discuss the generation of a low yield of ATP from anaerobic respiration and the formation of lactate in mammals.arrow_forwardQ11:arrow_forward© Macmillan Learning Reaction velocity Determine which of the graphs represents the relationship of reaction rate (velocity) and substrate concentration when the enzyme concentration of the non-allosteric enzyme is constant. Substrate concentration Answer Bankarrow_forward
- Could you be able to assist?arrow_forwardMacmillan Learning Write equations for the hydrolysis of ATP and ADP. Use abbreviations such as ATP for adenosine tripho Feedback represent inorganic phosphate. hydrolysis of ATP: hydrolysis of ADP: Incorrect Incorrect ADP + P. AMP + P₁ O Macmillan Learning Hydrolysis is a reaction in which a large molecule is split into two smaller molecules upon the addition of water, H₂O. Adenosine triphosphate, ATP, has one more inorganic phosphate group than does adenosine diphosphate, ADP. ADP has two phosphate groups, whereas adenosine monophosphate, AMP, has one. Consider whether P; should be placed on the left or the right side of the reaction arrow in each reaction.arrow_forwardReview your understanding of glycolysis, the Krebs cycle, and oxidative phosphorylation by classifying each characteristic below according to its pathway for cellular energy transfer. Enzyme location: Mitochondrial matrix Final product: Pyruvate (under aerobic conditions) Entering substrates: Acetyl coenzyme A and some amino acid intermediates ATP production: 3 ATP from each NADH + H+ and 2 ATP from each FADH2 Entering substrates: glucose and other monosaccharides Final product 2 CO2 for each acetyl coenzyme A Final product: Intermediates used for amino acid/organic molecule synthesis Enzyme location: Cytosol Coenzyme production: 3 NADH + 3H- and 1 FADH2 Coenzyme production: 2 NADH + 2 H (under aerobic conditions) ATP production: 2 per glucose molecule ATP production: 1 GTP formed directly can be converted to ATP Entering substrates Hydrogen ions and molecular oxygen Final product H2O - one molecule for each pair of hydrogen ions Enzyme location: Inner mitochondrial membrane Final…arrow_forward
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