3. b. If chymotrypsin is treated with dilsopropylfluorophosphate, catalysis cannot occur even In the presence of excess substrate concentration. Is this Inhibltion reversible or Irreversible?.
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- 1. The enzyme that catalyzes the conversion of CH4 + 02 to CH3OH is likely to be classified asa. Isomeraseb. Ligasec. Transferased. Lyasee. Hydrolasef. OxidoreductaseBypass reaction in the anabolic pathway often occurs when A The ΔG of the reverse reaction in the catabolic pathway has a large negative value B The ΔG of the reverse reaction in the catabolic pathway has a large positive value C The ΔG of the reaction in the anabolic pathway is close to zero D The ΔG of the reaction in the anabolic pathway is positive E None of the aboveCatalase breaks down hydrogen peroxide about107times faster than the uncatalyzed reaction. If the latter required one year, how much time would be needed by the catalasecatalyzed reaction?
- Dehydratase is a PLP-requiring enzyme that catalyzes an a,b-elimination reaction. Propose a mechanism for this reaction. dehydratasePLP +NH3O OO O− HO O− + NH46 If radio-labeled C-5 of glucose is used for glycolysis and alcoholic fermentation, which carbon in the final product(s) is labeled? Please explain the trace of the radio-labeled carbon in all the key steps (i.e. which carbon is labeled in FBP, DHAP/GAP, and pyruvate). Please answer the question by specifically stating which carbon is labeled in the final product and which carbon is labeled in each step. Thank You!1 ).Which of the following accurately describes substrate specificity for serine proteases? A.The binding cleft B.Mg2+ metal activated enzyme C.The catalytic triad D.Facilitates redox chemistry E.Stabilizes the transition state 2). Which of the following amino acid residues would not provide a side chain for acid-base catalysis at physiological pH? select all that apply leucine aspartic acid histidine lysine Please answer both correct i will give u upvote.
- Based on this graph, it appears that carboxylesterase is most active at a pH of A. 3.5B. 1.5C. 5D. 4Which of the following best explains why enzyme catalysis is affected by a change in pH? A. Change in pH alters ionization states of serine in the active site involved in nucleophilic catalysis B. The ionization states of his, asp and glu involved in acid/base catalysis are altered with change in pH C. Change in pH alters ionization states of contact amino acids in the active site D. All enzymes have optimum pH1. Please identify the substrate and type of reaction, and explain how these reactions work for the following two enzymes Two enzymes: succinate dehydrogenase and L-amino acid reductase
- 2. One manifestation of cytochrome oxidase deficiency in humans is severe muscle weakness. Briefly explain why. 3. Clostridium bacteria are killed in the presence of molecular oxygen. Would you expect Clostridium to produce catalase? Briefly explain.J. C. Servaites, in Plant Physiol. (1985) 78:839–843, observed that Rubisco from tobacco leaves collected before dawn had a much lower specific activity than the enzyme collected at noon. This difference persisted despite extensive dialysis, gel filtration, or heat treatment. However, precipitation of the predawn enzyme by 50% (NH4)2SO4 restored the specific activity to the level of the noon-collected enzyme. Suggest an explanation.The metabolism of alcohol pathway is showed in the figure characterized by biotransformation of: (Figure : Ethanol Metabolism Pathway - ADH : Alcohol dehydrogenases, ALDH: Aldehyde dehydrogenase ) (a) reaction phase I with two oxidations (b) reaction phase II with oxidation and sulfonation (c) reaction phase II with two hydrolysations (d) reaction phase II with two oxidations (e) reaction phase I with hydrolysis and oxidation