Biochemistry: Concepts and Connections (2nd Edition)
2nd Edition
ISBN: 9780134641621
Author: Dean R. Appling, Spencer J. Anthony-Cahill, Christopher K. Mathews
Publisher: PEARSON
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Textbook Question
Chapter 11, Problem 3P
a. NAD+ kinase catalyzes the ATP-dependent conversion of NAD + to NADP+ . How many reducing equivalents are involved in this reaction?
b. How many reducing equivalents are involved in the conversion of ferric ion to ferrous ion?
c. How many reducing equivalents are involved in reducing one molecule of oxygen gas to water?
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(a) NAD+ kinase catalyzes the ATP-dependent conversion of NAD+ to NADP+. How many reducing equivalents are involved in this reaction?
(b) How many reducing equivalents are involved in the conversion of ferric ion to ferrous ion?
(c) How many reducing equivalents are involved in reducing one molecule of oxygen gas to water?
A.What is the Result of the sodium potassium ATPase activity in the cell?
B.What mechanism does the sodium potassium ATPase use to achieve this result?
C. Why is the above-mentioned change in affinity critical for the sodium potassium ATPase to perform its function?
Cells maintain different steady state ratios of NAD+/NADH (1000) and NADP+/NADPH (0.01).
(a) How do these ratios relate to the metabolic functions of NAD+ and NADPH?
(b) Given these physiological ratios, what is the AG for NAD+ to oxidize NADPH?
(c) This reaction does not happen in most tissues. Make a hypothesis: what prevents this from
occuring?
Chapter 11 Solutions
Biochemistry: Concepts and Connections (2nd Edition)
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- The mitochondrial membrane potential is an indicator of cell viability. Think about mitochondrial function and decide which of these statements best describes the mitochondrial membrane potential. a.) A voltage that reflects the movement of ATP across the outer mitochondrial membrane b.) A voltage that reflects the movement of protons across the outer mitochondrial membrane c.) A voltage that reflects the movement of protons across the inner mitochondrial membrane d.) A voltage that reflects the movement of ATP across the inner mitochondrial membranearrow_forwarda.Write the balanced reactions catalyzed by complex I, II, III, and 1V, and using these, write the balanced net reaction for the electron transport chain. Structures are not necessary. b. Write the balanced reaction for the ATP synthase reaction. c. Write the net reaction for Oxidative phosphorylation showing the ATP produced from NADH oxidation and FADH2 oxidation. (this is in your text) d. Write the balanced reaction for ATP production by aerobic metabolism starting with glucose.arrow_forward1 a) What is meant by the ATP currency exchange ratio? Why does the oxidation of mitochondrial FADH2 generate one less ATP than oxidation of mitochondrial NADH? b) If 12 H+ are moved across the inner mitochondrial membrane by NADH oxidation, and each ATP synthesized requires 3 H+ to move through ATP synthase, why are only 3 ATP molecules produced by oxidation of each NADH?arrow_forward
- Can you explain the various the options and the answer?arrow_forwardCalculate for the following based on complete oxidation of 5 molecules of trisaccharide containing 2 hexoses and 1 triose. a. Total number of ATP produced= b. Total number of CO2 released= c. Total number of ATP from oxidative phosphorylation= d. Total number of ATP from NADH= e. Total number of ATP from substrate level of phosphorylation in Glycolysis=arrow_forwardDiscuss the relationship between redox potentials E0’ and the organization of the components of the electron transport chain. Be specific, i.e., use data/actual values to back up your discussion. a) What are the values of E0’ for all the components of the ETS? b)How are the E0’ related to ∆G values? c) How do the values of E0’ vary among the participants in the ETS relative to their position in the ETS?arrow_forward
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