In the Krebs Cycle (Citric Acid Cycle), A 4-carbon compound with a 2-carbon unit to yield a 6-carbon tricarboxylic acid Oxaloacetate, acetyl, citrate O Oxaloacetate, citrate, isocitrate O Fumarate, malate, oxaloacetate O Acetyl, succinate, malate condenses
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- The Reactions and Meehanisms of the Leloir Pathway Write the reactions that permit galactose to be utilized in glycolysis. Write a suitable mechanism, tor one of these reactions.If 14CO2 (radioactive carbon) were incorporated into the TCA cycle via the Pyruvate Carboxylase reaction which of the following molecules would contain radioactive carbon? a. Oxaloacetate b. Citric Acid c. Isocitrate d. Alpha-ketoglutarate e. Succinyl-CoA f .Succinate g. Fumarate h. MalateHow many ATP may be produced from 1 mole of the following compounds on complete oxidation using the glycerol-3-phosphate shuttle? COMPOUNDSa.) Mannoseb.) Dihydroxyacetone phosphatec.) Citrated.) Malatee.) Succinate
- Which of the following intermediates of the TCA cycle has 5 carbons? (Hint: You don't need to have memorized specific structures for this question, just recall what molecules the TCA cycle starts with and where in the cycle carbons are lost as CO2 ). a) Fumarate b) None of the above c) Succinyl CoA d) Citrate e) OxaloacetateCoenzyme Q is involved in electron transport as a— water-soluble electron acceptor. lipid-soluble electron carrier. cofactor of the malate shuttle. covalently attached cytochrome cofactor. water-soluble electron donor.The aspartate–malate shuttle transfers electrons from cytoplasmic NADH to the electron transport system. Which of the following molecules is not directly involved in this pathway? a. malate b. oxaloacetate c. citrate d. α-ketoglutarate
- What is the role of FAD in the preparation of pyruvate to enter the citric acid cycle? to perform a decarboxylation to eliminate a NADH group to perform an oxidation to regenerate the disulfide bond in lipoamide to perform a reduction to regenerate the disulfide bond in lipoamide to perform a hydrolysis to eliminate a NADH groupFAD is reduced in which of the following reactions/transformations in the Krebs cycle? a. Succiny| CoA to succinate b. Isocitrate to oxaloacetate c. Fumarate to malate d. Succinate to fumarateThioesters play important roles in glycolysis and tca cycle. List which reactions involve thioesters.
- Helicobacter pylori, which causes gastric ulcers, does not operate a citric acid cycle but contains many of the citric acid cycle enzymes. H. pylori can convert oxaloacetate to succinate for biosynthetic processes. Write an equation for this conversion.In generating CO2, how can the citric acid cycle discriminate between the carbons in citrate given that citrate is a symmetric achiral molecule?The citric acid cycle is shown. The methyl carbon in acetyl CoA is labeled with C14C14 (shown in red). Identify which of the carbons in each intermediate will be labeled in the first round of the cycle by selecting the indicated carbon(s). Each question has multiple options except citrate. Which carbon in citrate will contain C14? 4 1 3 2 Which carbon(s) in isocitrate will contain C14? 1 2 3 4 5 6 Which carbon(s) in α‑ketoglutarate will contain C14? 1 2 3 4 5 Which carbon(s) in succinyl‑CoA will contain C14? 1 2 3 4 Which carbon(s) in succinate will contain C14? 1 2 3 4 Which carbon(s) in fumarate will contain C14? 1 2 3 4 Which carbon(s) in malate will contain C14? 1 2 3 4 Which carbon(s) in oxaloacetate will contain C14? 1 2 3 4