Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 40.2, Problem 1CC
MAKE CONNECTIONS Ø How does negative feedback in thermoregulation differ from feedback inhibition in an enzyme-catalyzed biosynthetic process (see Figure 8.21)?
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SCIENTIFIC INQUIRY • DRAW IT A researcher has developedan assay to measure the activity of an important enzymepresent in pancreatic cells growing in culture. She adds theenzyme’s substrate to a dish of cells and then measures theappearance of reaction products. The results are graphed as theamount of product on the y-axis versus time on the x-axis. Theresearcher notes four sections of the graph. For a short periodof time, no products appear (section A). Then (section B) thereaction rate is quite high (the slope of the line is steep). Next,the reaction gradually slows down (section C). Finally, thegraph line becomes flat (section D). Draw and label the graph,and propose a model to explain the molecular events occurringat each stage of this reaction profile.
Hypothetical scenerio:
When the membrane potential is 80mV across the digestive vacuoles (DV), inside positive, the Vmax for VF-6-2 efflux is 15pmol/h. However, when the membrane potential is 80mV inside negative, the Vmax of VF-6-2 efflux drops to near zero. Researchers suggest an H+ P-type ATPase is also in the membrane and is required for VF-6-2 efflux.
Do these data support their suggestion? What type of transporter might PfCRT be? How can vanadate be used to potentially test their idea?
Macmillan 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.
Chapter 40 Solutions
Campbell Biology
Ch. 40.1 - What properties do all types of epithelia share?Ch. 40.1 - VISUAL SKILLS Consider the idealized animal in...Ch. 40.1 - WHAT IF? Suppose you are standing at the edge of...Ch. 40.2 - MAKE CONNECTIONS How does negative feedback in...Ch. 40.2 - If you were deciding where to put the thermostat...Ch. 40.2 - Prob. 3CCCh. 40.3 - Prob. 1CCCh. 40.3 - Flowers differ in how much sunlight they absorb....Ch. 40.3 - Prob. 3CCCh. 40.4 - If a mouse and a small lizard of the same mass...
Ch. 40.4 - Prob. 2CCCh. 40.4 - Prob. 3CCCh. 40 - Prob. 40.1CRCh. 40 - Is it accurate to define homeostasis as a constant...Ch. 40 - Given that humans thermoregulate, explain why your...Ch. 40 - Why do small animals breathe more rapidly than...Ch. 40 - Level 1: Knowledge/Comprehension 1. The body...Ch. 40 - Prob. 2TYUCh. 40 - Consider the energy budgets for a human, an...Ch. 40 - Prob. 4TYUCh. 40 - Prob. 5TYUCh. 40 - Prob. 6TYUCh. 40 - Prob. 7TYUCh. 40 - Prob. 8TYUCh. 40 - EVOLUTION CONNECTION In 1847, the German biologist...Ch. 40 - SCIENTIFIC INQUIRY Eastern tent caterpillars...Ch. 40 - SCIENCE. TECHNOLOGY. AND SOCIETY Medical...Ch. 40 - WRITE ABOUT A THEME: ENERGY AND MATTER In a short...Ch. 40 - 13. SYNTHESIZE YOUR KNOWLEDGE These macaques...
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- • Select the answers below as they pertain to the indicated pathway. • Note: for the NET ATP yield include any and all ATP equivalents generated in a particular pathway(i.e. ATP, GTP). This should include the oxidation of reducing equivalents that may be generated in the pathway. • Assume that NADH=2.5 ATP and FADH2=1.5 ATP • Assume the carbon reactants are each going through the pathway once. Pathway Net Carbon Reaction Net ATP 40 Acetyl-CoA ---> The Citric Acid Cycle 200 v ATP 80 v CO2 Complete net reaction: acetyl-CoA + GDP + P; + 3 NAD* + FAD ---> 2 CO, + CoA + GTP + 3 NADH + FADH Next • Previous Quiz saved at 4:45pm Submit Quiz PrtScn F8 Home F9 End F10 DII F5 F6 F7 SC F2 F3 F4 23 24 3. 4. 6 7 8 2arrow_forward-Inhibitor +Inhibitor [S] (mM) Vη&νβσπ: (μmol/sec). ν0&νβσπ;&νβσπ:(μmol/sec) 0.0001 33 17 0.0005 71 50 0.001 83 67 0.005 96 91 0.01 98 95 What is the TYPE of iinhibitor?arrow_forwardplz 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_forward
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