Consider the following reaction catalyzed by Phosphopentose Epimerase at 37 oC. Xylulose 5-phosphate ---> Ribulose 5-phosphate At equilibrium, the ratio of Xylulose 5-P / Ribulose 5-P = 1/18.85 Calculate K’eq.
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- Consider the following reaction catalyzed by Phosphopentose Epimerase at 37 oC. Xylulose 5-phosphate ---> Ribulose 5-phosphate At equilibrium, the ratio of Xylulose 5-P / Ribulose 5-P = 1/18.85 Calculate K’eq.Calculate the ΔGo’ for the following reaction at 37 oC: Galactose + Glucose → Lactose + H2O K’eq = 0.002089Determine the branch points and reducing ends of amylopectin. A 0.5g sample of amylopectin was analyzed to determine the fraction of the total glucose residues that are branch points in the structure. The sample was methylated and then digested, yielding 50 μmol of 2,3-methylglucose and 0.4 μmol of 1,2,3,6-tetramethyl glucose. (MWglucose = 162 g/mol, minus H2O) What fraction of the total residues are branch points? How many reducing ends does the amylopectin have?
- Inositol hexaphosphate (phytic acid, InsP6) is converted to 5-InsP7 by the action of the enzyme IP6K using adenosine 5'-triphosphate (ATP) as the substrate. What is the byproduct (indicated by ?) in the reaction? 2-O3PO OPO,2- InsPs 2-O3PO 5-InsP7 IP6K OPO,2- 2-O3PO- FOPO32 0- FOPO,2 2-03PO- OPO,2 OPO,2- АТР ? adenosine adenosine 5'-monophosphate adenosine 5'-diphosphate adenineThe 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.Classify the following monosaccharides as an aldose or ketose. I need help on number 5, a-d.
- C6H12O6 + a*O2 + b*NH3 --> c*CH1.64O0.52N0.16 + d*CO2 + e*H2O + f*C2H5OH In the aerobic yeast growth process, overflow metabolism can be observed when the sugar feed rate exceeds the oxidizing capacity of the yeast. In this case, part of the substrate is treated anaerobically and the production of biomass is reduced and ethanol is formed. This can also be observed when the respiratory rate RQ goes above one. The chemical composition of this yeast is CH1.64O0.52N0.16 . The yield of ethanol from glucose is 0.14 g g-1 and the yield of biomass from glucose is 0.362 g g-1. Calculate the oxygen demand of the reaction. In this calculation, use the following rounded even values as atomic weights for all calculations: C=12 g/mol, H=1 g/mol, O=16 g/mol ja N=14 g/mol. So how many moles of oxygen are needed per mole of glucose?what is the productA. Classify each of the following monosaccharides as aldose or ketose. (a) H. (b) CH2OH (c) CH2OH (d) H. C=0 C=0 HO-C-H H-C-H H-C-OH HO-C-H H-C-OH H-C-OH H-C-OH HO-C-H CH2OH H-C-OH CH2OH H-C-OH | CH2OH CH2OH Threose Ribulose Tagatose 2-Deoxyribose
- Understanding the optical rotation that we observe in lab is not the same as the specific rotation commonly reported in the literature; a student sets out to explore this on their own. They prepare a 0.083 g/mL sucrose solution, pour it into a 1 dm long optical cell, and measure the optical rotation of this solution to be 5.5 degrees. Use Biot's law to determine the specific rotation of sucrose and then the percent difference in compare this experimentally determined value against the accepted value provided above. Biot's law states www απ [a]lc where a is the observed optical rotation in units of degrees, 1 is the length of the cell in units of decimeters (dm), c is the sample concentration in units of grams per milliliter (g/mL), and [a] is the specific rotation in units of degrees (the formal unit for specific rotation is degrees divided by dmg/mL, but scientific literature uses just degrees). Percent difference = |Experimental value-Accepted value| Accepted value × 100%264&OpenVellumHMAC-ab644d9786730f4650f72638a7bd0c5b#10001 Part A L Submit Part B amylose and cellulose Match the words in the left column to the appropriate blanks in the sentences on the right. a(16) B(14) a(12) glucose a(14) 8(16) a(12) fructose Request Answer a(12) B(16) a(16) cellulose and chitin Match the words in the left column to the appropriate blanks in the sentences on the right. glucose -tose also called - Search a(14) fructose 8(14) B(12) x | + Both are linear polysaccharides composed entirely of linkages are but in cellulose, they are Both are linear polysaccharides with 2 DELL and chitin contains N-acetylglucosamine. A Q Reset Help In amylose, the glycosidic glycosidic bonds. Cellulose contains he Reset Help ENG ConstantsThe 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.
