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)
- |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_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_forwardWhat 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_forward
- Would you expect ATP to inhibit or stimulate activity of this enzyme in the glycolysis pathway? Why? What is the immediate energy source that drives ATP synthesis by ATP Synthase during oxidative phosphorylation? Where is CO2 produced in aerobic cell respiration? What would happen to chemiosmosis if the pH in the inner membrane space was decreased (lower)? What would happen if there was an absence of O2 in the electron transport chain? How many ATP’s are formed in the process phosphoglyceraldehyde also known as PGAL? Fatty acid chains after subjected to degradative enzymes in the intestines are hydrolyzed (hydrolysis) into 2 Carbon acetic acid fragments (Each fragment becomes an acetyl Co-A molecule). What stage of cellular respiration will this product of lipolysis enter? How many ATP can one fragment produce in cellular respiration? Calculate the number of ATP harvested from complete oxidation (breakdown) of an 18 carbon fatty acid? Calculate the number of ATP harvested from…arrow_forwardWhich of the following is the best definition of oxidative phosphorylation? Question 4 options: A) Electrons are passed through a series of carriers to O2 B) A proton gradient allows hydrogen ions to flow back into the cells through transmembrane protein channels, releasing energy that is used to generate ATP C) ATP is directly transferred from a substrate to ADP D) Electrons are passed through a series of carriers to an organic compoundarrow_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_forward
- how many net ATP molecules does the citric acid cycle generate in total? Consider both ATP generated directly by the citric acid cycle and ATP generated downstream in oxidative phosphorylation using other molecuies generated by the citric acid cycle For your answer, consider ATP and GTP to be equivalent A) 32 B) 20 C) 2 D) 10 E) 1arrow_forwardWhat are the differences between β-oxidation in mitochondria and in peroxisomes? What similarities are there between these processes?arrow_forwardCellular respiration is a metabolic process that breaks down glucose to produce adenosine triphosphate (ATP). Oxygen is an essential molecule to efficiently divert the glucose into an energy-rich molecules needed to sustain activities of the cell. Hence, carbon dioxide and water are the end-products of cellular respiration. The overall process can be refined into three main metabolic stages namely (1) glycolysis, (2) tricarboxylic acid cycle (TCA cycle), and (3) oxidative phosphorylation. In plant cells, the enzymes that catalyze the individual steps involved in respiration and energy conservation are located in highly organized compartment called mitochondrion. In this laboratory activity, you will use the germinated mung beans (Vigna radiata) to demonstrate what happens to the stored sugar in the seed upon its utilization during cellular respiration. At the end of the experiment, you are expected to identify what are the different factors that affect cellular respiration.arrow_forward
- Since no molecular oxygen participates in the citric acid cycle, the steps in which acetyl groups are oxidized to CO2 involve removal of hydride ions and hydrogen ions. What is the acceptor of hydride ions? What is the acceptor of hydrogen ions?arrow_forwardHow many ATP will be produced in an oxidative level phosphorylation of a molecule of glucose in a eukaryotic cell?arrow_forwardWhat steps in glycolysis generate substrate-level phosphorylation, and how many ATP molecules are generated in this way in this pathway? How does the generation of ATP by substrate-level phosphorylation differ from ATP generation by oxidative phosphorylation?arrow_forward
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