The equilibrium constant Kc for the reaction fructose-1,6-diphosphate = glyceraldehyde-3-phosphate + dihydroxyacetone phosphate is 8.9 x 10-5 M at 25°c and the behavior is assumed to be ideal.
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- Which of the following best describes the structure below A. Dextrorotatory B. Ketose C. Hexose D. Levarotatory E. Pentose F. Aldose G. Terosefor the equilibrium PH3BCI3(s)=PH3(g)+BCI3(g) Kp=0.052 at 60degreesCelsius calaculate KcWhich of the following combination in each pair is likely to produce more Maillard browning when heated at 95 °C for 4 hours? Explain the chemical basis for your choice. Sucrose + glycine, pH 7.0 vs. glucose + glycine, pH 7.0 Maltose with a dextrose equivalency (DE) of 20 + glycine, pH 9.0 vs. maltose + glycine, pH 9.0 Lactose + glycine, pH 8.0 vs. lactose + glycine, pH 4.0
- Write down the reactions: D-Glucose + [Ag(NH3)2]+ →Which of the following combination in each pair is likely to produce more Maillard browning when heated at 95 °C for 4 hours? Explain the chemical basis for your choice. A.Sucrose + glycine, pH 7.0 vs. glucose + glycine, pH 7.0 B.Maltose with a dextrose equivalency (DE) of 20 + glycine, pH 9.0 vs. maltose + glycine, pH 9.0 C.Lactose + glycine, pH 8.0 vs. lactose + glycine, pH 4.0 Please answer very soon will give rating surely All questions answers neededOne step in glycolysis is the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate. The direct reaction of fructose-6-phosphate with inorganic phosphate fructose-6-phosphate + Pi ⇌ fructose-1,6-bisphosphate + H₂O is very unfavorable, with ∆G'°= 16.3 kJ/mol and K'eq = 1.39×10⁻³. However, in glycolysis the reaction is coupled to ATP hydrolysis: fructose-6-phosphate + ATP ⇌ fructose-1,6-phosphate + ADP and the reaction if favorable. What is the equilibrium [fructose-1,6-bisphosphate]/[fructose-6-phosphate] ratio in the coupled reaction when [ATP] = [ADP]? For ATP hydrolysis ∆G'°= -30.5 kJ/mol at 25°C.
- The carbonyl group in d-galactose may be isomerized from C1 to C2 by brief treatmentwith dilute base (by the enediol rearrangement, Section 23-7). The product is the C4epimer of fructose. Draw the furanose structure of the product.In one of the steps in this pathway fructose 1,6-biphosphate (F1,6BP) is converted to gylceraldehyde-3-phosphate (G-3-p) and dihydroxyacetone phosphate (DHAP). This reaction is catalyzed by the enzyme aldolase. For this reaction at 25 celcuius and Ph7 we have: Keq= 10-4M and Delta G = +5456 cal/mol Calculate the following: The concentration of F1, 6BP, DHAP and G-3-P at equilibrium when the initial F1,6BP is (A) 1M, (b) 10-2 M, (c) 2 X 10*4 M and (d) 10-5 M. I been trying to solve this problem but I dont even know where to begin with. Atleast help me with problem A, I would be able to guide myself through.Homework on: Carbohydrates V-11. Write Haworth projection formulas for such substances: 1.1 α-D-glucopyranose;1.2 β-D-fructofuranose;1.3 lactose.1.4 In each formula show the hemi-acetal hydroxyl.2. Write: why saccharose is a non-reducing disaccharide. 3. Write the equations of reactions:3.1 glucose +Ag2O(NH3)→;3.2 glucose +H2→;3.3 α-D-glucopyranose +CH3OH(HCl)→;3.4 β-D-glucopyranose +(CH3CO)2O→;3.5 maltose hydrolysis;3.6 glucaric acid formation from glucose.4. Describe the signs of reactions:4.1 silver mirror reaction for glucose;4.2 Selivanov's reactions for the fructose;4.3 glucose reactions with Cu(OH)2 without heating.
- Regarding 4-O- (α-D-psychofuranosyl) -β-D-allopyranose. Please indicate the RIGHT alternative: (a) The disaccharide reacts with CH3OH in an acid medium to form a glycoside that cannot be oxidized with HNO3. (b) It is a reducing disaccharide only in basic medium. (c) In the structure there is only one glycosidic bond that is of the type β 1-O-4 ' (d) The hydrolysis products of this disaccharide do not show mutarrotation. (e) The disaccharide structure contains two six-membered rings.The disaccharide lactulose consists of a d-galactopyranose subunit and a d-fructofuranose subunit joined by a β-1,4-glycosidic linkage. After treatmentof lactulose with 1. excess CH3I/Ag2O, 2. HCl/H2O, the d-galactopyranose subunit was found to have one nonmethylated OH group, whereas thed-fructofuranose subunit had two. Draw the structure of α-lactulose.Write the chemical equations of the following reactions(a) Glucose in heated with conc. H2SO4.(b) Sodium nitrate is heated with conc. H2SO4.