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CHEM 470 - Department of Chemistry and Biochemistry
CHEM 470 - Department of Chemistry and Biochemistry

Biochemistry 2000  Sample Questions 5  Transport, Carbohydrates, Metabolism
Biochemistry 2000 Sample Questions 5 Transport, Carbohydrates, Metabolism

... (a) The Ca2+-ATPase pumps Ca2+ out of the cytosol as ATP is hydrolysed. (b) The (H+-K+)-ATPase of the gastric pumps protons out of the cell. Each proton is accompanied by the transport of a K+ into the cell. (c) Subsequently to the action of the describe (H+-K+)-ATPase, the K+ is again transported o ...
Respiration: Occurs in two places in the cell Cytoplasm and
Respiration: Occurs in two places in the cell Cytoplasm and

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... i. Fats have ____more_________ (more/less) kcal per gram than carbohydrate and proteins ii. Locations were fats are made________Liver_________ and _______adipocytes________ 1. Due to the increased NADPH made in these cells during the shunt iii. Location in the cell of synthesis:___cytosol___________ ...
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Chapter 23 - Evangel University

... Essential Amino Acids • The biosynthesis of proteins requires the presence of all the constituent amino acids • Some species, including humans, cannot produce all of the amino acids and they must come from ____________ and are called essential amino acids ...
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... chemical compound formed with the energy released from food and stored in all cells, particularly muscles. Only from the energy released by the breakdown of this compound can the cells perform work. The breakdown of ATP produces energy and ADP. ...
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... a. A metabolic branch point of glycolysis (prior to pyruvate). Discuss the metabolic choices and how the cell decides which path to follow. b. The hormonal regulation of blood glucose and the effect it has on glycolysis, gluconeogenesis, and glycogen metabolism. Mention any organs involved in this p ...
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Fig. 5-1

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... Overall cost of synthesis in bacteria includes 7 ATP as the energy cost of making 7 malonyl-CoA: acetyl CoA carboxylase 7 acetyl-CoA + 7 ATP + 7 CO2 + 7 H2 O → 7 malonyl-CoA + 7 H+ + 7 ADP + 7 Pi Overall cost of synthesis in mammalian cells includes an additional 8 ATP required for citrate lyase cit ...
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... NADH produced from one molecule of glucose during glycolysis have three possible metabolic fates. Under aerobic conditions, pyruvate is oxidized, with the loss of CO2 to produce acetyl-CoA and NADH. AcetylCoA then enters the citric acid cycle where it is completely oxidized into CO2 and H2O. Under a ...
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Citric acid cycle



The citric acid cycle – also known as the tricarboxylic acid (TCA) cycle or the Krebs cycle – is a series of chemical reactions used by all aerobic organisms to generate energy through the oxidation of acetate derived from carbohydrates, fats and proteins into carbon dioxide and chemical energy in the form of adenosine triphosphate (ATP). In addition, the cycle provides precursors of certain amino acids as well as the reducing agent NADH that is used in numerous other biochemical reactions. Its central importance to many biochemical pathways suggests that it was one of the earliest established components of cellular metabolism and may have originated abiogenically.The name of this metabolic pathway is derived from citric acid (a type of tricarboxylic acid) that is consumed and then regenerated by this sequence of reactions to complete the cycle. In addition, the cycle consumes acetate (in the form of acetyl-CoA) and water, reduces NAD+ to NADH, and produces carbon dioxide as a waste byproduct. The NADH generated by the TCA cycle is fed into the oxidative phosphorylation (electron transport) pathway. The net result of these two closely linked pathways is the oxidation of nutrients to produce usable chemical energy in the form of ATP.In eukaryotic cells, the citric acid cycle occurs in the matrix of the mitochondrion. In prokaryotic cells, such as bacteria which lack mitochondria, the TCA reaction sequence is performed in the cytosol with the proton gradient for ATP production being across the cell's surface (plasma membrane) rather than the inner membrane of the mitochondrion.
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