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18. The carbon atoms of glutamate can enter the citric acid cycle after transamination to the...
need help with the blank please Certain microorganisms with an incomplete citric acid cycle decarboxylate a-ketoglutarate...
need help with the blank please
Certain microorganisms with an incomplete citric acid cycle decarboxylate a-ketoglutarate to produce succinate semialdehyde. A dehydrogenase then converts succinate semialdehyde to succinate. Соо Coo CH, CH, NAD NADH CH, CH CH Co COO 000 -ketoglutarate Succinate Succinate semialdehyde These reactions can be combined with other standard citric acid cycle reactions to create a pathway from citrate to oxaloacetate that bypasses the reaction catalyzed by Dehydrogenase Tha reaction, a step that is accompanied by the...
6. (10 pts) For the following step in the citric acid cycle, COO H COO CH...
6. (10 pts) For the following step in the citric acid cycle, COO H COO CH Succinate dehydrogenase + FAD + FADH CH, OOC H COO Succinate Fumarate a. What class of enzyme catalyzes this reaction? b. How does this step ultimately contribute to the formation of ATP? Be specific, c. Knowing that the next step is a hydration of the alkene, briefly explain why this step needed to occur? That is, why not hydrate the succinate?
Question 6 6. (10 pts) For the following step in the citric acid cycle, COO H...
Question 6
6. (10 pts) For the following step in the citric acid cycle, COO H COO CH Succinate dehydrogenase + FAD + FADH CH, OOC H COO Succinate Fumarate a. What class of enzyme catalyzes this reaction? b. How does this step ultimately contribute to the formation of ATP? Be specific, c. Knowing that the next step is a hydration of the alkene, briefly explain why this step needed to occur? That is, why not hydrate the succinate?
One of the early steps in the citric acid cycle is the conversion of oxaloacetate to...
One of the early steps in the
citric acid cycle is the conversion of oxaloacetate to citrate..
see picture for more details
1. One of the early steps in the citric acid cycle is the conversion of oxaloacetate to citrate (see below). Propose a mechanism for this two step process using water and acidic/basic groups on the enzyme as needed (think NAC and NAS) OOC COO S- CoA. CH H20 O -C HO O -C CH citrate synthase CH CH2...
1. The enzyme responsible for the substrate level phosphorylation in the citric acid cycle is: a...
1. The enzyme responsible for the substrate level phosphorylation in the citric acid cycle is: a succinate dehydrogenase b. a-ketoglutarate dehydrogenase c. succinyl thiokinase d. isocitrate dehydrogenase e. aconitase 2. Which of the listed enzymes of the TCA cycle does not represent a regulatory enzyme?: a. isocitrate dehydrogenase b. succinate dehydrogenase c. malate dehydrogenase d. a-ketoglutarate dehydrogenase complex e. citrate synthase 3. Oxidative decarboxylation of pyruvic acid is regulated by: a. cyclic AMP-dependent mechanism b. cyclic AMP-independent mechanism 4. The...
You are carrying out an experiment in the lab to study the citric acid cycle. To do this, you add 14C-labeled pyruvate at carbon 3 (this is the methyl carbon) to metabolically active mitochondria. Bas...
You are carrying out an experiment in the lab to study the citric acid cycle. To do this, you add 14C-labeled pyruvate at carbon 3 (this is the methyl carbon) to metabolically active mitochondria. Based on your knowledge of the citric acid cycle, what is the location of the 14C-label in oxaloacetate after one turn of the cycle? How many turns of the cycle are required to release all of the14C-label as CO2? Be sure to justify your answers by...
QUESTION 4 How many carbon atoms enter the citric acid cycle at a time? 2 4...
QUESTION 4 How many carbon atoms enter the citric acid cycle at a time? 2 4 3 6 QUESTION 7 How many molecules of ATP (NET) are produced directly from the GLYCOLYSIS of molecules of glucose? 3 2.5 10 QUESTIONS Which of the following are NOT found in the electron transport chalet O2 CO2 Hions Felons QUESTION Which letter corresponds to the ANOMERIC Carbon in the saccharide shown to the right? Answer tal CH OH ON OH он OM b...
Question: You buy a sample of glucose that has the radioactive carbon-14 (C) isotope at the...
Question: You buy a sample of glucose that has the radioactive carbon-14 (C) isotope at the second position (Carbon #2). All other carbon positions in the glucose molecules have the "C isotope. "C is only a label and does not alter the biochemical behavior of the molecules in which it is found. This glucose sample is mixed with all the enzymes derived from liver cells, which initially contain no other C-labeled chemicals. A) Draw the Haworth structure of glucose and...
6. Usually, hydrogen atoms are to evolved ways of stabilizing what such as the following (part...
6. Usually, hydrogen atoms are to evolved ways of stabilizing what such as the following (part of the ci rogen atoms are terrible leaving groups. However, biological enzymes have ays of stabilizing what would otherwise be a poor leaving group, resulting in reactions ne following (part of the citric acid cycle). The reaction follows an E2 mechanism, and we expect that the hydrogens that are removed must be anti to each other. We can prove hypothesis by performing the reaction...
11. The citric acid cycle begins with the formation of a 6-carbon (6C) molecule from joining...
11. The citric acid cycle begins with the formation of a 6-carbon (6C) molecule from joining the 4-carbon (4C) oxaloacetate and the 2-carbon (2C) acetyl group (see below). By about halfway through the cycle, two carbons have been lost as carbon dioxide and a 4C molecule labeled D is regenerated. List two reasons why the cycle does not stop after production of D and instead must continue through a series of different 4C intermediates 12. Which of the following statements...
need help with the blank please
Certain microorganisms with an incomplete citric acid cycle decarboxylate a-ketoglutarate to produce succinate semialdehyde. A dehydrogenase then converts succinate semialdehyde to succinate. Соо Coo CH, CH, NAD NADH CH, CH CH Co COO 000 -ketoglutarate Succinate Succinate semialdehyde These reactions can be combined with other standard citric acid cycle reactions to create a pathway from citrate to oxaloacetate that bypasses the reaction catalyzed by Dehydrogenase Tha reaction, a step that is accompanied by the...
6. (10 pts) For the following step in the citric acid cycle, COO H COO CH Succinate dehydrogenase + FAD + FADH CH, OOC H COO Succinate Fumarate a. What class of enzyme catalyzes this reaction? b. How does this step ultimately contribute to the formation of ATP? Be specific, c. Knowing that the next step is a hydration of the alkene, briefly explain why this step needed to occur? That is, why not hydrate the succinate?
Question 6
6. (10 pts) For the following step in the citric acid cycle, COO H COO CH Succinate dehydrogenase + FAD + FADH CH, OOC H COO Succinate Fumarate a. What class of enzyme catalyzes this reaction? b. How does this step ultimately contribute to the formation of ATP? Be specific, c. Knowing that the next step is a hydration of the alkene, briefly explain why this step needed to occur? That is, why not hydrate the succinate?
One of the early steps in the
citric acid cycle is the conversion of oxaloacetate to citrate..
see picture for more details
1. One of the early steps in the citric acid cycle is the conversion of oxaloacetate to citrate (see below). Propose a mechanism for this two step process using water and acidic/basic groups on the enzyme as needed (think NAC and NAS) OOC COO S- CoA. CH H20 O -C HO O -C CH citrate synthase CH CH2...
1. The enzyme responsible for the substrate level phosphorylation in the citric acid cycle is: a succinate dehydrogenase b. a-ketoglutarate dehydrogenase c. succinyl thiokinase d. isocitrate dehydrogenase e. aconitase 2. Which of the listed enzymes of the TCA cycle does not represent a regulatory enzyme?: a. isocitrate dehydrogenase b. succinate dehydrogenase c. malate dehydrogenase d. a-ketoglutarate dehydrogenase complex e. citrate synthase 3. Oxidative decarboxylation of pyruvic acid is regulated by: a. cyclic AMP-dependent mechanism b. cyclic AMP-independent mechanism 4. The...
QUESTION 4 How many carbon atoms enter the citric acid cycle at a time? 2 4 3 6 QUESTION 7 How many molecules of ATP (NET) are produced directly from the GLYCOLYSIS of molecules of glucose? 3 2.5 10 QUESTIONS Which of the following are NOT found in the electron transport chalet O2 CO2 Hions Felons QUESTION Which letter corresponds to the ANOMERIC Carbon in the saccharide shown to the right? Answer tal CH OH ON OH он OM b...
Question: You buy a sample of glucose that has the radioactive carbon-14 (C) isotope at the second position (Carbon #2). All other carbon positions in the glucose molecules have the "C isotope. "C is only a label and does not alter the biochemical behavior of the molecules in which it is found. This glucose sample is mixed with all the enzymes derived from liver cells, which initially contain no other C-labeled chemicals. A) Draw the Haworth structure of glucose and...
6. Usually, hydrogen atoms are to evolved ways of stabilizing what such as the following (part of the ci rogen atoms are terrible leaving groups. However, biological enzymes have ays of stabilizing what would otherwise be a poor leaving group, resulting in reactions ne following (part of the citric acid cycle). The reaction follows an E2 mechanism, and we expect that the hydrogens that are removed must be anti to each other. We can prove hypothesis by performing the reaction...
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