1. Under what circumstances in the cell would the entire pentose phosphate pathway be carried out with intermediates then being recycled into only glycolysis? A. When the cell needs more NADPH than ribose. B. When the cell needs both NADPH and ribose. C. When the cell needs NADPH and ATP. D. When the cell has enough NADPH and ribose.
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- 1. Under what circumstances in the cell would the entire pentose phosphate pathway be carried out with intermediates then being recycled into only glycolysis? A. When the cell needs more NADPH than ribose. B. When the cell needs both NADPH and ribose. C. When the cell needs NADPH and ATP. D. When the cell has enough NADPH and ribose.Rapidly dividing cells such as bone marrow, skin, intestinal mucosa, and cancer cells need DNA synthesis. In these cells, the following is observed: a. a decreased NADPH / NADP+ ratio b. increased flux through the oxidative reactions c. Flux through the oxidative reactions is low and the nonoxidative reactions are reversed to make ribose 5-phosphate. d. Ribose 5-phosphate is recycled through the oxidative steps via the nonoxidative reactions and gluconeogenesis. e. Ribose 5-phosphate is shunted into glycolysis by the nonoxidative reactions.Glycolysis is often split up into three phases: 1. Energy Investment 2. Sugar Splitting and 3. Energy Payoff. After splitting the 6-carbon sugar, Fructose 1,6-biphosphate, 4 ATP are generated by substrate-level phosphorylation. What is substrate-level phosphorylation? A. ATP generated by chemiosmosis B. ATP generated by the direct transfer of a phosphate from an organic molecule to ADP C. ATP generated by the fermentation of alcohol D. Transfer of phosphates between glucose molecules E. All of the above
- ATP production is limited from glycolysis in strenuously exercising muscle or when yeast are fermenting carbohydrates in closed vessels. The limiting factor is Select one: a. the increased acidity from lactic acid causing muscle damage b. the accumulation of CO, c. the lack of ATP to continue glycolysis d. the lack of organic fuel molecules to oxidize e. the need to regenerate NAD+Anaerobic Glycolysis (of 1 mole glucose) that ends with lactate fermentation provides the cell with: a. 1 mole of NAD+, which is a necessary substrate for performing glycolysis once more b. 1 mole of NADH, in from the investment stage of glycolysis c. 2 moles of ATP and 2 moles of lactate d. All of these answers are trueWhich of the following statements about the use the NADPH generated from the pentose phosphate pathway is not true? NADPH generated from the pentose phosphate pathway is used for the synthesis of fatty acids. b. NADPH generated from the pentose phosphate pathway and cytoplasmic NADH is metabolically interchangeable. O c. NADPH generated from the pentose phosphate pathway is used for the regeneration of glutathione to its reduced state. O d. NADPH generated from the pentose phosphate pathway is used for lipid synthesis. Clear my choice
- With regards to glycolysis, all of the following statements are FALSE except . a. glycolysis does not require oxygen o b. 4 net ATP are formed O c. 2 ATP gre formed in the energy payoff phase d. 1 ATP are used in the energy payoff phase e. glycolysis occurs in the mitochondriaThe first half of glycolysis is called investment phase or preparatory phase because a ATP is released to form a nearly symmetrical molecule. b ATP is released to trap glucose in the cell. c ATP is consumed to form G3P at the end of this phase d ATP is consumed to generate NADH at the end of this phaseThe net result of glycolysis is Select one: O a. 2 NADH, 4 ATP, and 2 pyruvates O b. 2 NADH, 2 ATP, and 2 pyruvates O c. 36 ATP O d. 2 NADH, 2 ATP, and 2 acetyl-CoAs O e. 8 NADH, 2 ATP, and 6 carbon dioxides
- Chemical potential energy stored in the reduced coenzyme, NADH or FADH2 is converted to chemical potential energy in ATP in which of the following processes? a. the citric acid cycle b. glycolysis c. beta oxidation d. oxidative phosphorylation. e. all of the aboveA. What is substrate level phosphorylation. B. Although oxygen does not participate directly in the citric acid cycle , the cycle only operates when oxygen is present. Why is this so so ? C.describe how hibernating animals and new born babies are able to keep warm without shivering. D. What is the metabolic purpose of hexose monophospate shunt pathway E.hg does G6PD deficient individuals have increase in resistance to malaria?1. For each of the products, identify the phase of aerobic respiration where these molecules will enter the process. a. glycerol b. fatty acids c. amino acids 2. predict the number of ATP molecules that could be produced from one glucose molecule if oxygen was not available.