Which of the following is NOT true about the pyrucate dehydrogenase complex (PDHC)? A. The sulfur...
Homework Answers
The correct option is E. PDHC catalyzes a substrate level phosphorylation.
.
The reaction catalysed by PDH complex produce NADH. This reaction is an example of oxidative phosphorylation.
In substrate level phosphorylation, ATP is directly produced by the reaction without the use of electron transport chain.
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Which of the following is NOT true about the pyrucate dehydrogenase
complex (PDHC)?
A. The sulfur...
A H57K mutation in chymotrypsin would have as compared to the wild type. decreased KM decreased...
A H57K mutation in chymotrypsin would have as compared to the wild type. decreased KM decreased kcat increased KM O no difference (mutation has no effect) Which of the following is true about the pyruvate dehydrogenase complex (PDHC)? Decarboxylation occurs first. OPDHC catalyses a substrate level phosphorylation. The sulfur atoms in the lipoamide arm assist by carrying protons. OPDHC catalyses the most rate limiting reaction in cellular respiration. NADH is produced by E1. The PDHC contains 5 enzymes.
1. Select the TRUE statement about the citric acid cycle. A. Isocitrate dehydrogenase is a multienzyme...
1. Select the TRUE statement about the citric acid cycle. A. Isocitrate dehydrogenase is a multienzyme complex that is very similar to the pyruvate dehydrogenase complex B. The two decarboxylation steps occur right after each other, first via oxidative alpha- decarboxylation, then via oxidative beta- decarboxylation. C. In one turn of the cycle, the two carbons that enter the cycle as acetyl CoA are the same two carbons that are released as CO2. D. A flavin containing dehydrogenase enzymes oxidizes...
please help, thank you! Which of the following are true of lipoamide in pyruvate dehydrogenase (PDH)?...
please help, thank you!
Which of the following are true of lipoamide in pyruvate dehydrogenase (PDH)? (Choose all that apply.) Select all that apply The "active" part of the chemical structure of lipoamide that participates in the reactions of PDH is an amide group. Lipoamide is reduced by FADH2 from the E1 subunit. Lipoamide accepts an activated aldehyde from TPP in E1. A covalent bond is formed and broken between lipoamide and a compound with three carbon atoms during the...
1. When the cell’s ATP supply is depleted, which of the following enzyme’s activity is increased?...
1. When the cell’s ATP supply is depleted, which of the following enzyme’s activity is increased? Hexokinase Pyruvate kinase Glucokinase Phosphofructokinase Explain why this enzyme activity is tied to ATP levels. 2. The pyruvate kinase catalyzed step is not a reversible reaction in glycolysis, how then does gluconeogenesis start from pyruvate? Show the mechanism of the first step of gluconeogenesis. 3. Which of the following cofactors do not form a covalent bond with enzymes' lysine residues? Lipoamide Biotin NADH Pyridoxyl...
Which of the following answers complete the sentence correctly? The pyruvate dehydrogenase complex is activated by:...
Which of the following answers complete the sentence correctly? The pyruvate dehydrogenase complex is activated by: Select one or more: a. decreased levels of insulin b. phosphorylation of the pyruvate dehydrogenase component E1 c. stimulation of a specific phosphatase by Ca2+ d. decrease of the NADH/NAD+ ratio e. inhibition of a specific kinase by pyruvate
15. Genetic defect in pyruvate dehydrogenase complex lead a. maple syrup urine disease b. phenyike d....
15. Genetic defect in pyruvate dehydrogenase complex lead a. maple syrup urine disease b. phenyike d. lactic acidemia e. pellagra syrup urine disease b, phenylketonuria c. galactosemia 10. Chemical modification by phosphorylation of pyruvate dehydros a. deactivates the enzyme b. activates the enzyme lation of pyruvate dehydrogenase complex : 17. Pyruvate carboxylase is positively ated through the allosteric mechanism by : a. ATP b. NADH c. Acetyl-SCOA d. TPP e. Biotin 18. Which of the listed coenzymes does not particip...
Which of the following statements is not true? Glycolysis produces most of the ATP required by...
Which of the following statements is not true? Glycolysis produces most of the ATP required by aerobic organisms like us Glycolysis produces pyruvate, which is consumed by the Krebs cycle Glycolysis occurs in the cytosol of the cell Glycolysis is the first stage of cellular respiration • The Krebs cycle reactions Takes place in the cytoplasm Converts glucose to pyruvate Generate ATP with the help of an enzyme complex called ATP synthase Yield ATP, NADH, and FADH2 • Which of...
Which of the following is correct? O Most of the ATP are produced by substrate-level phosphorylation....
Which of the following is correct? O Most of the ATP are produced by substrate-level phosphorylation. O Glycolysis relies on substrate-level oxidation for the four ATP produced in this pathway. O Most ATP from cellular respiration are produced directly in the citric acid (Krebs) cycle. Each FADH2 yields about 1.5 ATP via oxidative phosphorylation. Submit Request Answer
1220 Which is not a result of one pass through the citric acid cycle? A. 2...
1220 Which is not a result of one pass through the citric acid cycle? A. 2 molecules of Co, are produced. B. 3 molecules of NADH are produced from NAD C. 1 substrate-level phosphorylation occurs to produce GTP or ATP. D. 2 QH, are produced by the succinate dehydrogenase complex. E. The oxidation of L-malate regenerates oxaloacetate. 2012 Which enzyme catalyzes a substrate-level phosphorylation reaction? A. Isocitrate dehydrogenase B. Succinyl-CoA synthetase C. Fumarase D. Aconitase E. Citrate synthase 14.30 What...
From the following which is true about cellular respiration (select all that apply) 1. In prokaryotes,...
From the following which is true about cellular respiration (select all that apply) 1. In prokaryotes, the electrons transport is in the plasma membrane 2. Prokaryotic fermentation net yield is 4 ATP and oxidative respiration has 32 ATP 3. The major regulatory enzyme of glycolysis is Hexokinase 4. Substrate-level phosphorylation is catalyzed by kinase and transfers the phosphate group from an intermediate in a metabolic pathway directly to a molecule of ADP
A H57K mutation in chymotrypsin would have as compared to the wild type. decreased KM decreased kcat increased KM O no difference (mutation has no effect) Which of the following is true about the pyruvate dehydrogenase complex (PDHC)? Decarboxylation occurs first. OPDHC catalyses a substrate level phosphorylation. The sulfur atoms in the lipoamide arm assist by carrying protons. OPDHC catalyses the most rate limiting reaction in cellular respiration. NADH is produced by E1. The PDHC contains 5 enzymes.
please help, thank you!
Which of the following are true of lipoamide in pyruvate dehydrogenase (PDH)? (Choose all that apply.) Select all that apply The "active" part of the chemical structure of lipoamide that participates in the reactions of PDH is an amide group. Lipoamide is reduced by FADH2 from the E1 subunit. Lipoamide accepts an activated aldehyde from TPP in E1. A covalent bond is formed and broken between lipoamide and a compound with three carbon atoms during the...
15. Genetic defect in pyruvate dehydrogenase complex lead a. maple syrup urine disease b. phenyike d. lactic acidemia e. pellagra syrup urine disease b, phenylketonuria c. galactosemia 10. Chemical modification by phosphorylation of pyruvate dehydros a. deactivates the enzyme b. activates the enzyme lation of pyruvate dehydrogenase complex : 17. Pyruvate carboxylase is positively ated through the allosteric mechanism by : a. ATP b. NADH c. Acetyl-SCOA d. TPP e. Biotin 18. Which of the listed coenzymes does not particip...
Which of the following statements is not true? Glycolysis produces most of the ATP required by aerobic organisms like us Glycolysis produces pyruvate, which is consumed by the Krebs cycle Glycolysis occurs in the cytosol of the cell Glycolysis is the first stage of cellular respiration • The Krebs cycle reactions Takes place in the cytoplasm Converts glucose to pyruvate Generate ATP with the help of an enzyme complex called ATP synthase Yield ATP, NADH, and FADH2 • Which of...
Which of the following is correct? O Most of the ATP are produced by substrate-level phosphorylation. O Glycolysis relies on substrate-level oxidation for the four ATP produced in this pathway. O Most ATP from cellular respiration are produced directly in the citric acid (Krebs) cycle. Each FADH2 yields about 1.5 ATP via oxidative phosphorylation. Submit Request Answer
1220 Which is not a result of one pass through the citric acid cycle? A. 2 molecules of Co, are produced. B. 3 molecules of NADH are produced from NAD C. 1 substrate-level phosphorylation occurs to produce GTP or ATP. D. 2 QH, are produced by the succinate dehydrogenase complex. E. The oxidation of L-malate regenerates oxaloacetate. 2012 Which enzyme catalyzes a substrate-level phosphorylation reaction? A. Isocitrate dehydrogenase B. Succinyl-CoA synthetase C. Fumarase D. Aconitase E. Citrate synthase 14.30 What...
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