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Concept explainers
(a)
Interpretation: To list the steps, by number in the citric acid cycle that involves oxidation and decarboxylation.
Concept introduction: Citric acid cycle is the third stage of the biochemical energy production process. The cycle includes the reactions in which the acetyl part of acetyl CoA is oxidized and leads to the formation of carbon dioxide and
Oxidation and decarboxylation step involves simultaneous oxidation and decarboxylation to produce the product.
(b)
Interpretation: To list the steps, by number in the citric acid cycle that involves phosphorylation.
Concept introduction: Citric acid cycle is the third stage of the biochemical energy production process. The cycle includes the reactions in which the acetyl part of acetyl CoA is oxidized and leads to the formation of carbon dioxide and
Phosphorylation step involves the phosphorylation of the reactant in that step of the citric acid cycle to produce the product.
(c)
Interpretation: To list the steps, by number in the citric acid cycle that involves condensation.
Concept introduction: Citric acid cycle is the third stage of the biochemical energy production process. The cycle includes the reactions in which the acetyl part of acetyl CoA is oxidized and leads to the formation of carbon dioxide and
An overview of the citric acid cycle is as follows:
Condensation step involves the condensation of the reactant in that step of the citric acid cycle to produce the product.
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Chapter 23 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- What steps in the citric acid cycle have each of the following characteristics? a. The reaction generates FADH 2. b. The organic substrate is oxidized. c. The reaction utilizes NAD +. d. The reaction breaks a carbon–carbon bond.arrow_forwardThe citric acid cycle occurs in the : a. Cytosol b. Mitochondrial matrix c. Inner membrane of the mitochondria d. Nucleusarrow_forwardUsing the following glycolisis diagram, a. name all the steps in citric acid cycle, what are the intermediates. refer to the diagram given. b. Is glycolysis endothermic or exothermic.arrow_forward
- Which one of the following statements about coenzyme Q is not true? a. coenzyme Q is lipid-soluble b. coenzyme Q can accept one or two electrons c. conenzyme Q often diffuses in the membrane from one protein complex to another in its semiquinone form d. Coenzyme Q is one of the five electron carriers used in the electron transport chainarrow_forwardWhich of the following statements is true about the citric acid cycle a. The Citric Acid Cycle is an 8-step cycle that produces the most electron carrier molecules throughout the process of cellular respiration. b. In Citric Acid Cycle, both the acetyl group and coenzyme A of Acetyl CoA are combined to oxaloacetate. c. In Citric Acid Cycle, glucose is only partially broken down and there are still remnants of glucose after this process. d. The ATP produced during this process is via oxidative phosphorylationarrow_forwardDescribe two important roles of the citric acid cycle.arrow_forward
- Glycogen phosphorylase degrades glycogen by: a. An hydrolysis reaction. b. An oxidation-reduction reaction. c. A phosphorolysis reaction. d. A transferase reactionarrow_forwardWhich of the following is the third step of Citric Acid Cycle? Select one: a. Succinyl-CoA becomes Succinate and forms one ATP molecule and Coenzyme A-SH b. Pyruvate is decarboxylated to become acetyl-CoA producing NADH and Carbon dioxide c. Isocitrate and then decarboxylated and oxidized to produce alpha-ketoglutarate, Carbon dioxide and NADH d. alpha-ketoglutarate is oxidized and decarboxylated to produce Succinyl-CoA, Carbon dioxide and NADH e. Succinate is oxidized to become fumarate forming FADH2 f. Oxaloacetate combines with the acetyl from acetyl-CoA to produce Citric acid(citrate) g. Citrate is rearranged to become Isocitrate h. Malate is oxidized to become oxaloacetate forming NADH i. Fumarate is combined with water to become Malatearrow_forwardFatty acids are catabolized by a process called beta-oxidation. One of the products of beta- oxidation is acetyl CoA. Given this information, the products of beta-oxidation will most likely be incorporated into which stage of cellular respiration? A the citric acid cycle B C D glycolysis oxidative phosphorylation the link reactionarrow_forward
- Which of the following is the sixth step of Citric Acid Cycle? Select one: a. Succinate is oxidized to become fumarate forming FADH2 b. alpha-ketoglutarate is oxidized and decarboxylated to produce Succinyl-CoA, Carbon dioxide and NADH c. Isocitrate and then decarboxylated and oxidized to produce alpha-ketoglutarate, Carbon dioxide and NADH d. Oxaloacetate combines with the acetyl from acetyl-CoA to produce Citric acid(citrate) e. Malate is oxidized to become oxaloacetate forming NADH f. Fumarate is combined with water to become Malate g. Citrate is rearranged to become Isocitrate h. Pyruvate is decarboxylated to become acetyl-CoA producing NADH and Carbon dioxide i. Succinyl-CoA becomes Succinate and forms one ATP molecule and Coenzyme A-SHarrow_forwardThe enzymes of the citric acid cycle are located in a. Cytoplasm b. Endoplasmic reticulum c. Mitochondrial matrix d. Nucleusarrow_forwardList the main features of the citric acid cyclearrow_forward
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