What kind of changes must occur in the structure of a hexose molecule in order to produce a 3 C prow from a 6 C hexose? Write down their reactions. What steps does control take place? Explain. Make the energy balance of the cycle.
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What kind of changes must occur in the structure of a hexose molecule in order to produce a 3 C prow from a 6 C hexose? Write down their reactions.
What steps does control take place? Explain.
Make the energy balance of the cycle.
Step by step
Solved in 2 steps with 1 images
- Use arrow-pushing to show how the glycerol phosphate reacts with the base :B and NAD* to form DHAP. Show the products of the reaction, including the structure of DHAP. The image can be selected for copying and pasting. :B O-H 2. HO-CH-C-CH-O-Pi H H H NAD*List the three chemical processes that can lead to the removal of ions from solution and thus drive a metathesis reaction. Give one example for each of the three chemical processes.Consider the equation light energy + CO2 + h2O → sugars + O2 + heat energy. Would you expect this reaction to occur in a single step? Why must heat be generated in the reaction? explain your answers.
- Consider a reaction in which reactants X and Y combine to form the product Z. The diagram below compares the reaction coordinates for the catalyzed and uncatalyzed pathways of this reaction. B. X+Y Reaction Coordinate What does letter B represent? O Letter B represents the activation energy of the uncatalyzed reaction pathway. Letter B represents the energy difference between the reactants and products for the uncatalyzed pathway. O Letter B represents the activation energy of the catalyzed reaction pathway. Letter B represents the energy difference between the reactants and products for the catalyzed pathway. EnergyDetermine the direction that each of the reactions will progress. Assume that the reactants and products are present in equimolar amounts. The standard free energy of hydrolysis of ATP is - 30.5 kJ/mol. fructose + ATP fructose 6-phosphate + ADP The standard free energy of hydrolysis for fructose 6-phosphate is -15.9 kJ/mol. 3-phosphoglycerate + ATP 1,3-bisphosphoglycerate + ADP The standard free energy of hydrolysis for 1,3-bisphosphoglycerate is -49.3 kJ/mol. creatine + ATP creatine phosphate + ADP The standard free energy of hydrolysis for creatine phosphate is -43.0 kJ/mol.FoF1 ATPase is the enzyme that catalyzes ATP synthesis. The enzyme itself is deactivated by ATP. What mode of enzyme regulation is being exemplified? Select the correct response: Trasncriptional control Covalent modification Proteolytic modification Allosteric regulation Compartmentation
- One of the examples that we have used to illustrate the concept of equilibrium is the isomerization of glucose-6-phosphate (G6P) to fructose-6-phosphate (F6P), which is the second step in g ycolysis. Draw a graph to show how the reaction Gibbs energy varies with the fraction fof F6P in solution.Label the regions of the graph that correspond to the formation of F6P and G6P being spontaneous, respectively.The unicellular fungus Saccharomyces cerevisiae is used in the food industry to ferment sugars. The rate of fermentation is measured by CO2 production. The addition of inorganic phosphate increases this rate.1. Why does the fermentation of sugars, such as glucose and fructose, depend upon the presence of Pi? Which glycolytic reactions require Pi? 2. Several glycolytic intermediates contain phosphate. Where did these groups come from during the reactions? How much Pi is required to generate one CO2? 3. Is CO2 generation the most reliable way to measure ethanol fermentation? Why or why not?Consider the mechanism below. (i) Identify Asp X's function in the first step of the reaction. Expla how you determined this and why Asp X's function is increasing the rate. (ii) Identify Asp X's fu in the second step of the reaction. (iii) For His D, explain how it contributes to the reaction and why that contribution increases the reaction rate. Asp X o HN Asp X o N. N. H. Coo His D Co0o-H His D OR HO, O. LOR HO. HO- но. HN Asn N HN Asn N ndn Asp Z Asp Z
- 1) Describe the change of Cis-aconitate to Isocitrate. 2) Are enzymes changed during a reaction they catalyze? 3) What does "induced fit" mean when talking about enzymesThe conversion of substance X to substance Y is an endergonic reaction, but it can be driven if coupled to the hydrolysis of ATP. Write simple equations illustrating how that can occur.Consider the following metabolic pathway and answer the questions. CHOPO, CHOPO, H-C-OH CHOH он OH HO-C-H H-C-OH H-C-OH H-C-OH H -OH a. Give the two principal metabolic functions of this pathway CHO CHOH H--OH b. Write the number of the reaction HO-C H--OH CHOPO, that is an oxidative decarboxylation. H-C-OH c dentify the products of reaction 8 by name or by structure. CH,OH HO-H d. Identify a reaction that uses CHO thiamine pyrophosphate as a cofactor H-C-OH H-C-OH H-C-OH e Identify a reaction that involves the hydrolysis of an ester. H -OH CHOPO CHO CHOH H-C-CH -OH Name the products of reaction 6. HO-C-H H-C-OH H-C-OH CHOPO