Most ATP is generated by oxidative phosphorylation in aerobic or anaerobic respiration while substrate-level phosphorylation provides a quicker, less efficient source of ATP, independent of external electron acceptors. This is the case in human erythrocytes, which have no mitochondria, and in oxygen-depleted muscle.Overview of oxidative phosphorylation. The electron transport chain forms a proton gradient across the inner mitochondrial membrane, which drives the synthesis of ATP via chemiosmosis.A) Most of the ATP are produced by substrate-level phosphorylation. B) Oxidation of FADH2 eventually yields four ATP via oxidative phosphorylation. C) Glycolysis relies on substrate-level oxidation for the four ATP produced in this pathway. D) Most ATP from cellular respiration are produced directly in the Krebs cycle.Two ATP molecules are formed during Krebs cycle by substrate level phosphorylation when succinyl coenzyme A transfers its high energy to a phosphate group that joins GDP/ADP to form GTP/ATP. Thus, a total of 6 ATP molecules are formed through substrate level phosphorylation during aerobic respiration of one glucose molecule.Substrate -level phosphorylation, where a substrate of glycolysis donates a phosphate to ADP, occurs in two steps of the second-half of glycolysis to produce ATP. The availability of NAD+ is a limiting factor for the steps of glycolysis; when it is unavailable, the second half of glycolysis slows or shuts down.
Oxidative phosphorylation | Biology (article) | Khan Academy
ATP is synthesized by substrate-level phosphorylation during which of the following? a) conversion of pyruvate to lactate only b) glycolysis only c) glycolysis, the Krebs cycle, and during conversion of pyruvate to lactate d) Krebs cycle only e) glycolysis and the Krebs cycle only Also, just for my own knowledge, Is conversion of pyruvate to lactate considered substrate level phosphorylation?Hexokinase catalyses a substrate-level phosphorylation reaction. **This statement is FALSE. Hexokinase catalyzes the transfer of a phosphate from ATP to glucose, which is classified as a phosphate transfer reaction. A substrate-level phosphorylation is the direct transfer of a phosphoryl group to ADP generating ATPSubstrate-level phosphorylation is of. Figure 3.13 Formation of ATP by substrate level phosphorylation (see also Figure 5.10). relatively minor importance in ensuring a supply of ATP, although, as discussed in section 5.4.1.2, it becomes important in muscle under conditions of maximum exertion.ATP is synthesized by substrate-level phosphorylation during which of the following? a) conversion of pyruvate to lactate only b) glycolysis only c) glycolysis, the Krebs cycle, and during conversion of pyruvate to lactate d) Krebs cycle only e) glycolysis and the Krebs cycle only Also, is conversion of pyruvate to lactate considered substrate level phosphorylation? Thanks.
Metabolism Flashcards by Amy Lee | Brainscape
Substrate-level Phosphorylation and Fermentation: Substrate-level phosphorylation, is a mechanism by which high energy phosphate bonds from organic intermediates of the fermentation are transferred to ADP producing ATP.during exercise, increased metabolic activity increases body heat, which then triggers sweating. which of the following best describes the function of sweating. most of the ATP synthesized during cellular respiration is the result of substrate level phosphorylation (t/f) false. which of the following is not a mechanism of heat production.ATP is synthesized by substrate-level phosphorylation during which of the following? A) glycolysis only B) conversion of pyruvate to lactate only C) Krebs cycle only D) glycolysis and the Krebs cycle only E) glycolysis, the Krebs cycle, and during conversion of pyruvate to lactateATP, the "high-energy" exchange medium in the cell, is synthesized in the mitochondrion by addition of a third phosphate group to ADP in a process referred to as oxidative phosphorylation. ATP is also synthesized by substrate-level phosphorylation during glycolysis.ATP is synthesized by substrate-level phosphorylation during which of the following? A. glycolysis only conversion of pyruvate to lactate B. only Krebs cycle C. only glycolysis and the Krebs cycle D. only glycolysis, the Krebs cycle, and during the conversion of pyruvate to lactate
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