All of the following statements about the citric acid cycle are true except: O The citric acid cycle occurs in the cytoplasm of prokaryotes. O The citric acid cycle regenerates NAD+ and FAD. O The citric acid cycle involves one or more redox reactions. O The citric acid cycle is part of cellular respiration.
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- Both prokaryotic and eukaryotic organisms carry out some form of glycolysis. How does ha fact support or not support the assertion that glycolysis is one of the oldest metabolic pathways?match the cofactor with its function in the citric acid cycle by entering the number corresponding with the function. A given function may be used more than one time or not at all. Use from the following list of functions to fill in the table below: carries O2 carries small carbon-containing molecules carries e- carries small nitrogen-containing molecules Cofactor Function NAD+/NADH FAD/FADH2 CoA thiamine biotinCyanide poisoning inhibits aerobic respiration at cytochrome c oxidase. Which of the following is NOT a result of cyanide poisoning at the cellular level? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b с d e Oxygen is reduced to water The rate of glycolysis increases Cells are forced to switch to anaerobic respiration The electron transport chain is not completed None of the above Answered K Open in Reading View ✔Posubmit
- Follow the two carbon atoms that enter the citric acid cycle (C₂). Are the two CO₂ molecules given off in one turn of the citric acid cycle composed of the same 2 carbon atoms that entered the cycle? NADH + H+ NAD+ H HỌ—C—COO- H₂C-COO- °↑ 7 FADH₂ 0 C-C00 H₂C-COO- Oxaloacetate Malate HC-COO- -OOC-CH Fumarate FAD Succinate H₂C-COO H₂C-COO CH,CO—S-CoA Acetyl coenzyme A GTP COA GDP COA H₂C-COO- HỌ–C–COO- H₂C-COO- Citrate H₂C-COO- Isocitrate HC-COO- HO–C–COO H e T CO₂ Succinyl COA H₂C-COO- CO₂ a-Ketoglutarate CoA H₂C-CO-S-CoA H₂C-COO H₂C 0-C-COO- NAD+ NADH + H+ NAD+ NADH + H+The reaction pictured is an oxidation-reduction reaction in the citric acid cycle in which the energy-carrier molecule NADH is generated. Identify which molecule in the reaction will be oxidized and which molecule will be reduced. Place a single answer choice in each box. COO- HO-C-H H-C-H COO- Malate NAD+ NADH + H+ Oxidized malate oxaloacetate COO- H-C-H ī COO- Oxaloacetate Reduced NADH NAD+Describe the citric acid cycle. In how many steps does it take place? What is the substrate? What are the products? Where does it happen?
- The citric acid cycle is frequently described as the major pathway of aerobic catabolism, which means that it is an oxygen-dependent degradative process. However, none of the reactions of the cycle directly involve oxygen as a reactant. Why is the pathway oxygen dependent?Which of the following best describes the net organic products formed during the oxidation of one acetyl group to two molecules of carbon dioxide via the citric acid cycle? 3 NADH + 1 FADH2 + 1 GTP 2 NADH + 2 FADH2 + 2 ATP 1 NADH + 3 FADH2 + 1 GTP 6 NADH + 6 ATP 3 NADHWhich of the following is the second step of Citric Acid Cycle? Select one: a. Isocitrate and then decarboxylated and oxidized to produce alpha-ketoglutarate, Carbon dioxide and NADH b. Succinyl-CoA becomes Succinate and forms one ATP molecule and Coenzyme A-SH c. alpha-ketoglutarate is oxidized and decarboxylated to produce Succinyl-CoA, Carbon dioxide and NADH d. Malate is oxidized to become oxaloacetate forming NADH e. Fumarate is combined with water to become Malate f. Citrate is rearranged to become Isocitrate g. Pyruvate is decarboxylated to become acetyl-CoA producing NADH and Carbon dioxide h. Oxaloacetate combines with the acetyl from acetyl-CoA to produce Citric acid(citrate) i. Succinate is oxidized to become fumarate forming FADH2
- For Krebs Cycle(Citric Acid Cycle) what are steps of cellular respiration for both aerobic (oxygen present) and anaerobic (without oxygen) respiration. what are the Inputs and Outputs: Clearly indicate the key substrates, intermediates, and products at each stage. Location: Show where this stage of cellular respiration occurs within the cell (e.g., cytoplasm, mitochondria). Energy Production: Highlight the ATP and NADH production at this stage. Oxygen: Show where oxygen is used in the process (e.g., ETC) and where carbon dioxide is produced. Electron Carriers: Indicate the role of electron carriers such as NAD+ and FAD in transferring eleDiagrams: Use diagrams or icons to represent the structures and molecules involved, such as the mitochondria, glucose, ATP, and oxygen. Key Information like important facts or formulas relevant to cellular respiration, like the chemical equations for each stage.Describe the citric acid cycle by identifying the following: The form in which carbon atoms leave the cycle The form in which hydrogen atoms and electrons leave the cycle Identify the enzymes at three control/regulation points The fuel needed by the cycleThe following statements describe the path of electrons from NADH through the electron transport chain. Please arrange them in order: Cytochrome c (Fe2+) carries electrons to Complex IV. Cytochrome c (Fe3+) is reduced to cytochrome c (Fe2+) QH2 carries electrons to Complex III Oxygen is reduced to water Ubiquinone (coenzyme Q) is reduced to ubiquinol (QH2)