BIOLOGY
4th Edition
ISBN: 9781266739606
Author: Hoefnagels
Publisher: MCG
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Chapter 4.2, Problem 3MC
Summary Introduction
To determine:
The protein that is oxidized and the protein that is reduced with reference to figure 4.6 “Electron Transport Chain,” given in the textbook and also explain the reason for the same.
Concept introduction:
Oxidation is a process in which a substance or an ionic species looses electron or there is an addition of oxygen or removal of hydrogen. Reduction is a process in which a substance or an ionic species gains electron and in which oxygen is removed or the hydrogen is added.
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First find and label ATP Synthase on the diagram below. Make boxes and add the labels for
ATP, ADP, and Pi. Use an arrow indicating ATP being made by the right part of the synthase.
This diagram also shows the mitochondrial electron transport chain. Work with your team to add the
following labels
Complexes l-IV
Intermembrane space
02
FADH2
FAD
H20
NAD+
Matrix
NADH
Path of electrons
Protons
Figure 7.10b
Biology: How Life Works, Second Edition
© 2016 Macmillan Education
Draw a simple word diagram showing the path of electrons through the electron-transport chain.b) On your word diagram below, circle the complexes that pump protons across the inner mitochondrial membrane. Put a box around mobile electron carriers.
We know that atmospheric oxygen (O2) can be a final electron acceptor at the end of the electron transport chain in aerobic respiration.
Name 2 other inorganic molecules that can be final electron acceptors at the end of the electron transport chain in anaerobic respiration.
Name 1 organic molecule that can be a final electron acceptor in fermentation.
Chapter 4 Solutions
BIOLOGY
Ch. 4.1 - What are some examples of the work of a cell?Ch. 4.1 - Prob. 2MCCh. 4.1 - Prob. 3MCCh. 4.1 - Prob. 4MCCh. 4.2 - What is metabolism on a cellular level?Ch. 4.2 - Prob. 2MCCh. 4.2 - Prob. 3MCCh. 4.3 - What are the main parts of an ATP molecule?Ch. 4.3 - Prob. 2MCCh. 4.3 - Describe the relationships among endergonic...
Ch. 4.4 - Prob. 1MCCh. 4.4 - Prob. 2MCCh. 4.4 - Prob. 3MCCh. 4.4 - Prob. 4MCCh. 4.4 - List three conditions that influence enzyme...Ch. 4.5 - What is diffusion?Ch. 4.5 - What types of substances diffuse freely across a...Ch. 4.5 - Prob. 3MCCh. 4.5 - Prob. 4MCCh. 4.5 - Prob. 5MCCh. 4.5 - Prob. 6MCCh. 4.6 - How does a knifefish adjust its electric field?Ch. 4.6 - Prob. 2MCCh. 4 - Prob. 1MCQCh. 4 - Building proteins _____ energy; ATP hydrolysis...Ch. 4 - How does ATP participate in coupled reactions? a....Ch. 4 - How does an enzyme affect the energy of a...Ch. 4 - Imagine that you place a drop of red food coloring...Ch. 4 - Prob. 6MCQCh. 4 - Prob. 7MCQCh. 4 - Some people claim that lifes high degree of...Ch. 4 - List some examples of endergonic and exergonic...Ch. 4 - Why do electron transport chains release energy?Ch. 4 - Provide an example of an appliance that uses...Ch. 4 - Name at least four ways that a cell uses ATP.Ch. 4 - Use what you know about enzymes to propose an...Ch. 4 - Considering that enzymes are essential to all...Ch. 4 - Prob. 8WIOCh. 4 - Prob. 9WIOCh. 4 - Liver cells are packed with glucose. If the...Ch. 4 - List three ways the content in this chapter...Ch. 4 - Prob. 1PITCh. 4 - Prob. 2PITCh. 4 - Prob. 3PIT
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- You are trying to figure out an electron transport pathway including the following electron transport molecules: B, K, T, Q and X. You do so by employing inhibitors for various steps in the process. When you do, you get the following results: Inhibitor Electron Transport Molecules Trapped in Reduced Form Ticin Q & K Digitin K Estin T, K, Q & B Lucin Q, K & T What is the order of the molecules (the pathway) in the electron transport chain suggested by the above data from the most reduced to the least reduced molecule? only one answer options: K —> T —> B —> Q —> X K —> Q —> T —> B —> X T —> B —> K —> Q —> X X —> B —> T —> Q —> Karrow_forwardModels such as the one shown in the illustration below are often used to represent the electron transport chain. Explain why this model is well-suited to this concept. Explain why metabolic processes such as cellular respiration and photosynthesis require a multi-stage release of energy, rather than a one-step reactionarrow_forwardUsing the answer code on the right, indicate which form of energy production is being described: 1. takes place in the mitochondrial matrix 2. produces H2O as a by-product 3. results in a rich yield of ATP 4. takes place in the cytosol 5. processes acetyl-CoA 6. takes place in the mitochondrial innermembrane cristae 7. converts glucose into two pyruvate molecules 8. uses molecular oxygen 9. accomplished by the electron transport system and ATP synthase (a) glycolysis (b) citric acid cycle (c) oxidative phosphorylationarrow_forward
- Look at the image of the electron transport chain below. Using the information provided in the picture only, in 4 or more sentences explain what is occurring. In your answer you must mention: electrons (e), NADH, FADH2, H* ions, ATP synthase and ATP. mitochondria ELECTRON INPUT electrons from TRANSPORT Kreb's Electron Cycle Transport NADH and FADH2 OUTPUT 34-36 ATP H+ H+ H* H' H+ ELECTRON TRANSPORT CHAIN ATP SYNTHASE H' ADP ATP NADH FADH, H.arrow_forwardExplain how would compounds such as NAD+, NADH, ubiquinone, ubiquinol and cytochrome are able to facilitate the transport of electrons in the electron transport chain. Provide an explanation for why this mechanism for transporting electrons is evolutionary conserved across species and across biological systems.arrow_forwardFigure 7.11 Dinitrophenol (DNP) is an "uncoupler" that makes the inner mitochondrial membrane "leaky" to protons. It was used until 1938 as a weight- loss drug. What effect would you expect DNP to have on the change in pH across the inner mitochondrial membrane? Why do you think this might be an effective weight-loss drug? Intermembrane space Mitochondrial matrix ATP Synthase ADP Inner mitochondrial membrane ATP Figure 7.11 ATP synthase is a complex, molecular machine that uses a proton (H) gradient to form ATP from ADP and inorganic phosphate (Pi). (Credit: modification of work by Klaus Hoffmeier)arrow_forward
- TOM A given enzyme is able to utilize five different substrates. The Km's have measured for each substrate. Which substrate is most likely the biochemi relevant one in the cell? In other words, which one is most likely the pred vivo substrate for this enzyme? (Choose the one best answer). Substrate 1 with KM= 4.7 × 10-1 M. Substrate 2 with Km = 1.5 × 10-2 M. Substrate 3 with KM = 1.5 x 10-8 M. × Substrate 4 with Km= 4.7 × 10-³ M Substrate 5 with KM = 4. 7 × 10-5 Marrow_forwardElectrons are continuously transferred from higher-energy carriers to lower-energy carriers in the electron transport chain, yet somehow iron is utilized as an electron carrier multiple times. Choose the most likely reason why this is possible. The pH of complex II is slightly higher than the pH of complex III. The reduction potential of flavin mononucleotide (FMN) in complex I is higher than the reduction potential of iron. The redox potential of iron ions can be manipulated by their environment. For instance, the iron in an iron-sulfur cluster will have a different redox potential than the iron in a heme group. The electrons carried by NADH are higher energy than the electrons carried by FADH2.arrow_forwardEnergy is required to reverse the flow of the electron transport chain. Why would this be so?arrow_forward
- Describe the electron transport chain . What is the substrate? What are the products? Where does it happen? What does it accomplish?arrow_forwardReferring to the figure below, explain why NADH yields more ATP than FADH2 does. Electron-transport and proton pump Oxidative phosphorylation Outer mitochondrial membrane H* -Intermembrane H+ H+ H+ space H* H+ H+ Cytochrome c H+ COQH, CoQ UU COQH2 CoQ JU U Inner mitochondrial membrane Ht e ATPase Complex II Complex II Complex IV Complex e ADP +P - Mitochondrial matrix NADH NAD+ FADH2 FAD АТР H+ -H+ H+ H20arrow_forwardYou create an artificial membrane system, containing a mixture of electron donors and other chemical components. Place the components listed below in the correct functional order (the order they should be for normal function). For each list, circle the actual final electron acceptor for the combination listed-meaning if the electrons cannot be passed along the full list of molecules, where do they stop? a. NADH, Q, Complexes I, Il and III, O2 b. FAD, cytochrome C, Q, Complexes I, II and IV, O2 c. NADH, Q, cytochrome C, Complexes I, IIl and IV, O2 d. Same as "c", but Q activity is blocked e. FADH2, Q, cytochrome C, Complexes II, IIl and IV, O2arrow_forward
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