Concept explainers
To determine: How much ATP is made to the cell from a single glucose molecule by the operation of glycolysis, the formation of acetyl CoA, the citric acid cycle, and the electron transport chain and chemiosmosis.
Concept introduction: Aerobic respiration is a type of
To determine: The location glycolysis, the formation of acetyl CoA, the citric acid cycle, and the electron transport chain and chemiosmosis in a eukaryotic cell.
Concept introduction: Aerobic respiration is a type of cellular respiration, in which the oxygen is consumed as a reactant to generate adenosine triphosphate (ATP). It is the most efficient mode of respiration in most of the eukaryotic and prokaryotic organisms. It involves complete combustion or degradation of sugars or organic fuels and produces carbon dioxide (CO2), water, and ATP.
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Biology (MindTap Course List)
- Why are electron carriers (NAD+/NADH and FAD/FADH2) so important in the process of cellular respiration? A)NADH and FADH2 are major components of the ETC, so without them, there would be no ETC in the cell. B)They deliver electrons to the ETC, which in turn sets up chemiosmosis, where most of the ATP is generated. C)They separate the electrons from the protons so that the protons can be moved out of the mitochondrion. D)The electrons that they carry are able to directly phosphorylate ADP in order to generate the bulk of ATP in the cell. E) They transport protons across the mitochondrial membrane. 14.arrow_forwardWhat would be the effect on ATP production during chemiosmosis and oxidative phorphorylation, if the pH within the inner membrane space of the mitochondrion were decreased, assuming no effect of pH on the structure of proteins in the membrane? a) it would increase b) it would decrease c)it would stay the samearrow_forward|a) Explain why the citric acid cycle is considered to be the center of cellular metabolism. b) What are the substrates and products corresponding to one turn of the citric acid cycle? (no need for enzymes) c) Which steps of the citric acid cycle release CO2 as a product? Which steps produce NADH or FADH2? Which step produces GTP? d) How much ATP can be generated from glucose when the citric acid cycle is operating?arrow_forward
- a) What is the process by which cells generate ATP through a series of redox (chemical) reactions called? How many ATPs generated through this process from one Glucose molecule? b) What does cellular respiration accomplish for the cell? c) What happens to the NADH produced in glycolysis? Why does it need to get into the mitochondria? d) Write the role of O2 in cellular respiration. e) What happens to our body’s enzyme activity during fever? f) What is the difference between apo-enzyme and holo-enzyme? g) What is meant by the term specificity in relation to enzyme activity? h) If humans evolved from apes, why are there still apes? i) What are the risk factors of type 2 diabetes? j) Why was Lamarck wrong about giraffes?arrow_forwardAssume a cell undergoes the Aerobic Respiration option of catabolism. Calculate the number of ATP molecules that it could theoretically generate if it starts with each of thefollowing molecules. 1. a) A 10-unit polysaccharide (i.e., contains 10 glucose molecules) b) Two molecules of fructose 1,6-bisphosphate c) Four molecules of succinic acidarrow_forwardPhotosynthesis and aerobic cellular respiration both rely on electron transport chains to generate ATP. Which of the following does not correctly identify similarities and differences in the ETCs of these processes? a) Electrons delivered to the ETC are used to generate a proton gradient across the membrane b) In photosynthesis, the facilitated diffusion of protons across the membrane generates ATP and glucose molecules; in cellular respiration, this process generates ATP c) In photosynthesis, electrons are delivered to the ETC by NADPH; in cellular respiration, electrons are delivered to the ETC by NADH and FADH2 d) In prokaryotes, active transport moves protons across the cell’s plasma membrane during photosynthesis and cellular respirationarrow_forward
- What products of the citric acid cycle are needed for the electron transport chain? A) NADH/H+NADH/H+ and FADH2FADH2 B) NADH/H+NADH/H+ and HS−CoAHS−CoA C) FADH2FADH2 and HS−CoAarrow_forward5. a) The cell creates molecules of NADH and FADH2to use in the electron transport chain as they are electron carrier molecules. The electron transfers from these moleculesdrives the movement of what molecule across the mitochondrial membrane?b) What is chemiosmosis?c) How does the cell use chemiosmosis to drive overcome the thermodynamic barrier of bringing phosphates close togehter to create ATP?d) What steps of oxidative phosphorylation are in the cytosol and which are in the mitochondria?e) Cellular respiration can be controlled at the post-translational level. What does this mean, using GLUT as an example? Why is post-translational control of GLUT evolutionarilyadaptive over transcriptional control?f) How does establishment of equillibria of various molecules control metabolic reactions? What are three ways high ATP in the cell control cellular respiration?g) Why are the enzymes controlling the initial steps of various biochemical pathways are targeted by allosteric control?arrow_forwardThe enzyme Phosphofructokinase (PFK) is a key regulator of glycolysis. A) Does ATP bind the PFK allosteric siteor the active site? B) Does high amount of ATP in the cell activate or inhibit PFK? Why? C)What do you suppose happens to glucose if glycolysis is inhibited in the cell?arrow_forward
- Which of the following statements is true?a) the ATP synthase adds electrons directly to ADP to make ATP b) acetyl CoA produced in the citric acid cycle carries electrons to the electrontransport chainc) the electron transport chain pumps protons from the cytosol into the inter-membrane space of mitochondriad) carbon monoxide is an electron transport chain blockerarrow_forwardWhat is the net reaction of the citric acid cycle? What happens to each product? OXIDATIVE PHOSPHORYLATION: 3A) Thoroughly explain the biological significance of NADH/H* and FADH₂ and their roles in oxidative phosphorylation. 3B) Describe and diagram the general pathway of the electrons from NADH/H+ and FADH2 to 02 during the electron transport chain. 3C) What is "chemiosmotic coupling", and what is its relationship to ATP synthesis? 3D) During oxidative phosphorylation, what is oxidized and what is phosphorylated?arrow_forwardBoth prokaryotic and eukaryotic organisms carry out some form of glycolysis. How does that fact support or not support the assertion that glycolysis is one of the oldest metabolic pathways?arrow_forward
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning