Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
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Chapter 11, Problem 11.3CC
An essential structural feature in both mitochondria and chloroplasts is the presence of an ordered series of electron carriers. Discuss similarities and differences in electron transport in these two organelles.
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Chapter 11 Solutions
Becker's World of the Cell (9th Edition)
Ch. 11 - Both mitochondria and chloroplasts are...Ch. 11 - In the late 1800s, T. W. Engelmann illuminated...Ch. 11 - How do the type and arrangement of the various...Ch. 11 - An essential structural feature in both...Ch. 11 - Prob. 11.4CCCh. 11 - Explain how the Calvin cycle fixes three CO2...Ch. 11 - What are the major regulatory points in the Calvin...Ch. 11 - Although the typical chemical equation for...Ch. 11 - Prob. 11.8CCCh. 11 - True or False Indicate whether each of the...
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- Using a generalized terminology (i.e. neither CIII nor CIV specific), explain how complex III and IV act as electron/proton charge separation device (not a proton pump) in mitochondria bioenergetics to create electron potential through the iner mitochondria membranearrow_forwardexplain the relationship between the following structures (cell cytoplasm, mitochondria, krebs-cycle, electron transport chain).arrow_forwardConsider a 24:1 △cis-9 fatty acid in the mitochondrion. For each fatty acid given, determine the following. Total number of ATP deducted Total net ATParrow_forward
- Although the outer mitochondrial membrane is permeable to all small molecules, the inner mitochondrial membrane is essentially impermeable in the absence of specific transport proteins. Consider this information answer: Present two types of benefits derived from separating the reactions of glycolysis in the cytosol from those that occur during the citric acid cycle in the mitochondrion.arrow_forwardHow much energy is required to pump a mole of protons in a mitochondria with the following conditions? pH of matrix = 8.2, pH of intermembrane space 7.4, membrane potential of - 65 mV (N-side relative to P-side), temperature = 37C. Express answer to the nearest 0.1 kJ/mole.arrow_forwarda) In the common electron transport pathway, electrons move from reduced nicotinamide adenine dinucleotide (NADH) to the terminal electron acceptor found in eukaryotic mitochondria. Discuss the roles of mitochondria as a powerhouse in eukaryotes.arrow_forward
- In the 1930s, some physicians prescribed low doses of a compound called dinitrophenol (DNP) to help patients lose weight. This unsafe method was abandoned after some patients died. DNP uncouples the chemiosmotic machinery by making the lipid bilayer of the inner mitochondrial membrane leaky to H+ . Explain how this could cause weight loss and death.arrow_forwardAlthough the outer mitochondrial membrane is permeable to all small molecules, the inner mitochondrial membrane is essentially impermeable in the absence of specific transport proteins. Consider this information answer: The ATP generated by oxidative respiration is used throughout the cell. The majority of ATP production occurs in the mitochondrial matrix. How do you think ATP is made accessible to enzymes in the cytosol and other organelles?arrow_forwardThe TCA cycle enzyme aconitase and the electron transport proteins have chromophores that absorb in the visible part of the spectrum, and therefore mitochondria have a dark brown color. In contrast, none of the glycolytic enzymes have visible spectrum chromophores. Which of the following statements is true? Question 3 Select one: a. Migrating birds, such as ducks have “white” breast meat, because flying long distances requires anaerobic ATP generation. d. The leg muscle of turkeys is specialized for anaerobic ATP generation via glycolysis. e. The flight muscle of turkeys is specialized for anaerobic ATP generation via glycolysis. f. None of the answers are correct.arrow_forward
- The four complexes of the electron transport chain use the energy of electrons stored in reducing agents to create a concentration gradient of protons (H*) across the mitochondrial inner membrane. Give the number of protons pumped into the intermembrane space by each of the four complexes: complex I: complex II: complex III: complex IV:arrow_forwardThe maintenance of a proton motive force across the inner mitochondrial membrane is crucial for continued ATP production. Surprisingly, it has been discovered that the inner membranes of certain cells contain proteins, called uncoupling proteins, that are capable of transporting protons from the intermembrane space to the mitochondrial matrix. Why would mitochondria contain transporters that essentially waste energy potential in the proton gradient?arrow_forwardIt has been estimated that mitochondria occupy 20% of the volume in the human body. For a 70- kg adult, the average number of mitochondria has been estimated to be 1 × 10 (10,000 trillion). Using this information, provide a rough estimate of the average mass of a mitochondrion.arrow_forward
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