Assignment on Ketohexoses Construct the structure of the following enantiomers or mirror images: 1. D and L Fructose 2. D and L Allulose 3. D and L Sorbose 4. D and L Tagatose
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Assignment on Ketohexoses
Construct the structure of the following enantiomers or mirror images:
1. D and L Fructose
2. D and L Allulose
3. D and L Sorbose
4. D and L Tagatose
Step by step
Solved in 3 steps with 4 images
- 困 1 Which amino acid group is attributed Tryptophan could be considered as 'to the Maple syrup urine disease as 2 precursor of which compound? * Most of the ammonia released from 3 What cofactor is required for the 4 Which of following statements about 1 alpha amino acids reflects the Isynthesis of amino acid from carbohydrate intermediates in 5 hydroxyproline is INCORRECT? * an inborn error of metabolism? coupled action of transaminase and Melanin what other catalyst? * transamination? * Hydroxylation of proline residues is catalysed by a dioxygenase. Dicarboxylic amino acids O Melatonin O L-glutamate dehydrogenase O Niacin O Aromatic amino acids O Epinephrine Free proline cannot be hydroxylated to hydroxyproline. O L-amino acid oxidase Thiamin O Branched chain amino acids O Thyroid hormones O Carboxylase O Pyridoxal phosphate It is present in large amounts in collagen Sulphur-containing amino acids O Aminotransferase O There is no codon for hydroxyproline. O Riboflavin 7 Which of the…With one mole each of sucrose, and arginine: 1) rank these molecules in order of increasing energy production, 2) describe the metabolic pathways involved in producing ATP for each molecule, 3) approximate (and explain) and the number of Acetyl-Co A molecules that would be generated from each molecule.Diagram the cyclization of monosaccharides which leads to the formationof pyran rings. Required: Please show me a correct and step by step process of the diagram and show me the correct drawing of the pyran ring.
- Consider the complete oxidation of a mixed TAG containing the following fatty acid residues:At carbon 1: cerotic acidAt carbon 2: heptadecanoic acidAt carbon 3: palmitoleic acid Draw the structure of the mixed TAG.Which of the following best describes dextrans? The main linkage between glucose units is α1→4 Consists of a linear chain of hundreds to thousands of β(1→4) linked D-glucose units Gycosidic branches can be (1,2), (1,3), or (1,4) A linear glucan5-phosphate) and an aldopentose (ribose-5-phosphate) to an aldotriose (glyceraldehyde-3-phosphate) and a ketoheptose (sedoheptulose-7-phosphate). Notice that the total number of carbons in the reactants andproducts is the same (5 + 5 = 3 + 7). Propose a mechanism for this reaction. xylulose-5-PCH2OH CH2OPO32−C OHOHHOH sedoheptulose-7-P
- complete the following mechanism showing the cleavge of the peptide bond for the following cysteine protease reaction. you only need a catalytic dyad for cystein proteases because the pKa of cysteine is low enough (8) and close enough to the pH of 7.4 that is can easily be deprotonated by histidine.Which of the structures below is that of о-в-D-glucopyranosyl-(1->4)- a-D-glucoругanose CH2OH CH2OH H. OH он H Он OH OH CH2OH HOH2Ć OH он CH2OH CH2OH OH H он H он он CH2OH CH2 OH H OH он OH None of the other structures are correct.Phosphopentose isomerase interconverts the aldose ribose 5-phosphate and the ketose ribulose 5-phosphate. Propose a mechanism.
- Malonyl-ACP is a precursor in fatty acid synthesis in the acyl carrier protein pathway. Draw the structure of malonyl-ACP No stereochemistry required Represent ACP by R1 and be sure to include charges on atoms at ph=7(i) Describe the mechanism of chymotrypsin in cleaving a peptide bond, highlighting the roles of the catalytice triad for the two phases of the catalytic reactions. Explain the significance of the oxyanion hole for the catalysis. (ii) All serine proteases contain the catalytic triad and these amino acids are positioned in the exact same conformation. Since this is true, why do trypsin and chymotrypsin have such different substrate specificity? What features of the enzyme allow for this situation?Consider the ff dissacharides.a. Classify the glycosidic linkage as α or β and use numbers to designate its location (e.g. β1→3) b. What monosaccharides are formed when each of the disaccharides is hydrolyzed? c. Draw the chair conformation of each monosaccharide, where applicable.
