Why does the pentose phosphate pathway take place in the cytosol? O The reagent NAD* is only found in the cytosol. Substrates for other pathways in which carbohydrates are metabolized are found in the cytosol. The pentose phosphate pathway takes place in the Endoplasmic Reticulum. O If it took place in mitochondria it would compete with other metabolic pathways found there.
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- Medical researchers are studying a patient with the newly discovered u LEKS metabolic syndrome, in which a genetic mutaton prevents NADH produced in the cytosol from being reoxidized by the electron transport chain. Suppose the following nutrient molecule is digested and metabolized by this patient under anaerobic conditions, e.g. during a sudden intense exertion: de HO-CH: -OH Он н. HO H OH How many ATP molecules will uttimately be produced by the catabolism of this molecule? Note: you can ussume the catabohism is as complete as it can be under the conditions given above. How many molecules of pyruvate will be produced during dycalysist How many maleoules of lactate will be producedCyanide poisoning inhibits aerobic respiration at cytochrome c oxidase. Which of the following is NOT a result of cyanide poisoning at the cellular level? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b с d e Oxygen is reduced to water The rate of glycolysis increases Cells are forced to switch to anaerobic respiration The electron transport chain is not completed None of the above Answered K Open in Reading View ✔PosubmitOf eight enzymes in the CAC, why is the succinate dehydrogenase complex unique? Because it is a component of the electron transport chain Because it catalyzes an oxidative reaction Because it is an integral membrane protein All of the above Only A and C
- The metabolic pathway responsible for clearing lactic acid from our bodies is called the Cori Cycle. It occurs in the liver, and converts lactic acid back into pyruvic acid, and then into glucose. The glucose can then be used for energy metabolism again. However, the Cori Cycle requires a net input of 4 ATP to operate. Based on this information how can you describe the Cori Cycle? [Select any/all that apply.] Cori Cycle is exergonic. Cori Cycle is anabolc. Cori Cycle is catabolic. Cori Cycle is endergonic.In order for an adipose cell to synthesize decanoic acid, it will need substrates in the form of _______ ATP, _______ NADPH from the transport of citrate into the cytoplasm and the subsequent recycling of oxaloacetate, and _______ NADPH from the pentose phosphate pathway. You can ignore the ATP used to regenerate mitochondria oxaloacetate via pyruvate carboxylase.Glycolysis is the central metabolic pathway for any cell (prokaryotic or eukaryotic) to generate energy. The primary reactant that enter glycolysis is , and the process generates 2 (= reduced (= 3 carbon molecules.) co-enzyme, electron carrier molecule), and 2 Glucose (energy carrier molecule), 2 2 NAD+ 2 ADP 2NADH 2ATP Zw Pyruvate ●●● Pyruvate
- A given enzyme is able to utilize five different substrates. The Km's have measured for each substrate. Which substrate is most likely the biochemi relevant one in the cell? In other words, which one is most likely the pred vivo substrate for this enzyme? (Choose the one best answer). Substrate 1 with KM= 4.7 × 10-1 M. TOM Substrate 2 with Km = 1.5 × 10-2 M. Substrate 3 with KM = 1.5 x 10-8 M. × Substrate 4 with Km= 4.7 × 10-³ M Substrate 5 with KM = 4. 7 × 10-5 MThe functioning of a particular pathway often depends not only on control enzymes in that pathway but alsoon control enzymes of other pathways. What happens in the following pathways under the indicated conditions? Suggest what otherpathway or pathways might be influenced.(a) High ATP or NADH concentration and the citric acid cycle.(b) High ATP concentration and glycolysis.(c) High NADPH concentration and the pentose phosphate pathway.(d) High fructose-2,6-bisphosphate concentration and gluconeo genesis.Which of the following statement is TRUE about the using of proteins as fuel? Oa. Excess amino acids present are converted by enzymes to intermediates of glycolysis and the citric acid cycle of O b. None of the options is true O c. After amino acids can feed into glycolysis or the citric acid cycle, their amino groups must be removed, a process called deamination O d. Firstly, they must be digested to short amino acids chains O e. All of the options are true
- Some anaerobic bacteria use alternative pathways for glucose catabolism that convert glucose to acetate rather than to pyruvate. Shown below is one possible metabolic pathway. The first part of this pathway (glucose to fructose-1,6-bisphosphate) is identical to the glycolytic pathway. In the second part of the alternative pathway, Enzymes 1–6 all have mechanisms/ activities analogous t enzymes in glycolysis. Note that there are two C¬C bond cleavage reactions in this new pathway: A → B + C (Enzyme 1) and C → B + D. All the steps where ATP is consumed or generated have been shown; however, the addition or loss of NAD+/NADH, Pi , H2O, or H+ has not been shown explicitly. Draw the structures for the intermediates B, F, G, H, and I, and include other reaction participants as needed.In the first stage of glycolysis, the hydroxyl group on C6 of glucose is phosphorylated to form glucose-6-phosphate (G6P). In this reaction, which of the following statements is true? a. O b. d. e. Glucose kinase is used to catalyze the reaction. Hexokinase is used to catalyze the reaction. A molecule of NADH is synthesized. One ATP is synthesized. Fructose kinase is used to catalyze the reaction.The citric acid cycle is frequently described as the major pathway of aerobic catabolism, which means that it is an oxygen-dependent degradative process. However, none of the reactions of the cycle directly involve oxygen as a reactant. Why is the pathway oxygen dependent?