Homework Answers
Ans1.
A) Rotenone is a toxin that inhibits hydrogen delivery to electron transport chain by inhibiting the enzyme NADH Ubiquitone reductase in complex I
B) Antimycin A is a toxin that inhibits electron transport by inhibiting the oxidation of ubiquinol.
C) Carbon monoxide is a toxin that binds more strongly to the Fe-Cu centre, thereby inhibiting the oxygen delivery.
D) Oligomycin is an antibiotic that inhibits ADP phosphorylation by inhibiting the enzyme ATP synthase.
E) Heavy metals like MethyMercury can cause mitochondrial DNA damage.
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1) Find the following: A) Specific, Toxin or Toxicant that inhibits hydrogen delivery to the electron...
21) Which process in eukaryotic cells will normally proceed whether O2 is present or absent? A)...
21) Which process in eukaryotic cells will normally proceed whether O2 is present or absent? A) oxidative phosphorylation B) glycolysis C) Krebs cycle D) electron transport 22) The direct energy source that drives ATP synthesis during respiratory oxidative phosphorylation is A) thermodynamically favorable transfer of phosphate from glycolysis and Krebs cycle intermediate molecules of ADP. B) the thermodynamically favorable flow of electrons from NADH to the mitochondrial electron transport carriers. C) the final transfer of electrons to oxygen. D) the...
The electron transport chain(ETC), or respiratory chain, is linked to proton movement and ATPsynthesis....
The electron transport chain (ETC), or respiratory chain, is linked to proton movement and ATP synthesis. Select the statements that accurately describe the electron transport chain. Choose all that apply.Prosthetic groups, such as iron-sulfur centers, are directly involved with electron transfer. The reactions of the ETC take place in the outer membrane of mitochondria. Electron carriers in the mitochondrial matrix include ubiquinone (coenzyme Q), FMN, and cytochrome c. The outer membrane of mitochondria is readily permeable to small molecules and hydrogen ions. Electrons generated...
Cellular respiration: The Electron Transport Chain The breakdown of glucose ends during the Krebs cydle; however,...
Cellular respiration: The Electron Transport Chain The breakdown of glucose ends during the Krebs cydle; however, it is important to note that the energy previously contained in glucose is mostly stored in NADH and FADHz. In the last step of celular respiration, the high-energy electrons within NADH and FADH2 are passed within a set of proteins found in the inner membrane of the mitochondrion, collectively known as the electron transport chain. The electrons provide the energy to create ATP, which...
1. Describe the effect of the following substances on both cellular respiration (oxygen consumption by the...
1. Describe the effect of the following substances on both cellular respiration (oxygen consumption by the electron transport chain) and oxidative phosphorylation (ATP synthesis by the Fo/F1 ATPase complex): (a) Antimycin (b) Oligomycin (c) Thermogenin
QUESTION 1 Which of the following options lists the stages in cellular respiration in the correct...
QUESTION 1 Which of the following options lists the stages in cellular respiration in the correct order? A. glycolysis, oxidative phosphorylation, pyruvate oxidation, and the citric acid cycle B glycolysis, pyruvate oxidation, the citric acid cycle, and oxidative phosphorylation C. pyruvate oxidation, oxidative phosphorylation, glycolysis, and the citric acid cycle D. the citric acid cycle, oxidative phosphorylation, pyruvate oxidation, and glycolysis QUESTION 2 When a glucose molecule loses a hydrogen atom as the result of an oxidation-reduction reaction, the glucose...
27) Which one of the following best describes the electron transport chain? A) Electrons are passed...
27) Which one of the following best describes the electron transport chain? A) Electrons are passed from one carrier to another releasing a little energy at each B) Hydrogen atoms are added to CO2 to make an energy-rich compound. C) Electrons are pumped across a membrane by active transport. D) Glucose is broken down to a three-carbon compound 28) After completion of the citric acid cycle, most of the usable energy from the one molecule is in the form of...
Cytochrome c is an important molecule in initiating apoptosis in cells. All of the following regarding...
Cytochrome c is an important molecule in initiating apoptosis in cells. All of the following regarding cytochrome c are true EXCEPT: A) The release of cytochrome c into the cytoplasm is an important step in apoptosis initiation. B) The loss of cytochrome c from the electron transport chain blocks ATP synthesis by oxidative phosphorylation. C) Loss of cytochrome c from the inner mitochondrial membrane results in increased formation of reactive oxygen species. D) Bax proteins mediate cytochrome c release. E)...
1. Select the TRUE statement about the component of the electron transport chain. A. Complex III...
1. Select the TRUE statement about the component of the electron transport chain. A. Complex III is a peripheral membrane protein B. Cytochrome c is a lipid-linked protein C. Complex II is a transmembrane protein D. Complex I is an integral membrane protein E. Complex IV is not a transmembrane protein 2. The rate of oxygen consumption at the inner mitochondrial membrane is related to all the following EXCEPT: A. Availability of ADP in the mitochondria B. The rate of...
word bank Glucose is a simple sugаr easily used by cells to produce energy. v is...
word bank
Glucose is a simple sugаr easily used by cells to produce energy. v is the process that breaks the 6 carbon glucose into a three carbon pyruvate. The process takes place in the v. The citric acid cycle uses as a starting point the 2 carbon molecule v that can be obtained from the breakdown of fat, sugars, or proteins. The products of the citric acid cycle include (name one) v which serves as an electron donor for...
Can I get some help with question 1. a and b please? Uncouplers of oxidative phosphorylation...
Can I get some help with question 1. a and b please?
Uncouplers of oxidative phosphorylation in mitochondria inhibit the coupling between the electron transport and phosphorylation reactions and thus inhibit ATP synthesis without affecting the respiratory chain and ATP synthase (H(+)-ATPase). Miscellaneous compounds are known to be uncouplers, but weakly acidic uncouplers are representative because they show very potent activities. The most potent uncouplers discovered so far are the hindered phenol SF 6847, and hydrophobic salicylanilide S-13, whic are...
21) Which process in eukaryotic cells will normally proceed whether O2 is present or absent? A) oxidative phosphorylation B) glycolysis C) Krebs cycle D) electron transport 22) The direct energy source that drives ATP synthesis during respiratory oxidative phosphorylation is A) thermodynamically favorable transfer of phosphate from glycolysis and Krebs cycle intermediate molecules of ADP. B) the thermodynamically favorable flow of electrons from NADH to the mitochondrial electron transport carriers. C) the final transfer of electrons to oxygen. D) the...
Cellular respiration: The Electron Transport Chain The breakdown of glucose ends during the Krebs cydle; however, it is important to note that the energy previously contained in glucose is mostly stored in NADH and FADHz. In the last step of celular respiration, the high-energy electrons within NADH and FADH2 are passed within a set of proteins found in the inner membrane of the mitochondrion, collectively known as the electron transport chain. The electrons provide the energy to create ATP, which...
QUESTION 1 Which of the following options lists the stages in cellular respiration in the correct order? A. glycolysis, oxidative phosphorylation, pyruvate oxidation, and the citric acid cycle B glycolysis, pyruvate oxidation, the citric acid cycle, and oxidative phosphorylation C. pyruvate oxidation, oxidative phosphorylation, glycolysis, and the citric acid cycle D. the citric acid cycle, oxidative phosphorylation, pyruvate oxidation, and glycolysis QUESTION 2 When a glucose molecule loses a hydrogen atom as the result of an oxidation-reduction reaction, the glucose...
27) Which one of the following best describes the electron transport chain? A) Electrons are passed from one carrier to another releasing a little energy at each B) Hydrogen atoms are added to CO2 to make an energy-rich compound. C) Electrons are pumped across a membrane by active transport. D) Glucose is broken down to a three-carbon compound 28) After completion of the citric acid cycle, most of the usable energy from the one molecule is in the form of...
word bank
Glucose is a simple sugаr easily used by cells to produce energy. v is the process that breaks the 6 carbon glucose into a three carbon pyruvate. The process takes place in the v. The citric acid cycle uses as a starting point the 2 carbon molecule v that can be obtained from the breakdown of fat, sugars, or proteins. The products of the citric acid cycle include (name one) v which serves as an electron donor for...
Can I get some help with question 1. a and b please?
Uncouplers of oxidative phosphorylation in mitochondria inhibit the coupling between the electron transport and phosphorylation reactions and thus inhibit ATP synthesis without affecting the respiratory chain and ATP synthase (H(+)-ATPase). Miscellaneous compounds are known to be uncouplers, but weakly acidic uncouplers are representative because they show very potent activities. The most potent uncouplers discovered so far are the hindered phenol SF 6847, and hydrophobic salicylanilide S-13, whic are...
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