hich compound is more likely to absorb at 200-
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which compound is more likely to absorb at 200-300 nm? phenylanine or cysteine
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- What does the absorbance at 280 nm detect? aromatic amino acid side chains chaotropic salts EDTA contamination purines and pyrimidinesA Transmission Electron Microscopy image of Gold nanoparticles is shown below. Name a physical or chemical property that changes when gold is prepared as nanoparticles below 50 nm? Explain why. 20 nmA mixture of dipeptides consisting of Lys-Gly, Thr-His, Ser-Leu, Glu-Gln was applied to column packed with cation-exchange resin at pH 6.0. Which of these dipeptides would be eluted from the column first? O Lys-Gly first O Thr-His first O Ser-Leu first O Glu-Gln first OA mixture of Thr-His and Ser-Leu first
- An amino acid mixture of phenylalanine, glycine and glutamic acid is to be separated by paper chromatography. The solvent is less polar than water. Which of these amino acids will have the highest Rf value and which the lowest? Explain.An amino acid mixture of phenylalanine, glycine and glutamic acid is to be separated by paper chromatography.The solvent is less polar than water. Which of these amino acids will have the highest Rf value and which the lowest? Explain.Qualitative Color Reactions Color Reaction Biuret Ninhydrin Xanthoproteic Millon's Hopkins-Cole Sakaguchi Nitroprusside Fohl's Test for Amide Pauly Intact Protein Acidic Hydrolyzed Protein Basic Enzymatic
- The synthetic process by which monomers are covalently linked is (a) hydrolysis (b) isomerization (c) condensation (d) glycosidic linkage (e) ester linkageWhen measuring the absorbance of methylene blue solution containing corn starch, how would corn starch affect the absorbance of the solution if it is not completely filtered out? Explain. (Don't just say "it affects" but explain it increases/decreases the absorbance. )You have 10 mg/ml ethidium bromide solution. If you add 5 µl of this to 50 ml of agarose gel solution, what will be the final concentration of ethidium bromide in the gel solution in mg/ml?
- Guanosine (C10H13N5O5) in solution has a maximum absorbance at a wavelength of 275 nm. The molar extinction co-efficient at this wavelength is 84M−1cm−1and the path length is 24.7 cm. Through the use of a spectrophotometer, it is found that the that A275= 1.48. What is the concentration of the guanosine solution in grams/litre? Molecular weights (g/mol): C-12, H-1, N-14, O-16 Select one: A. 0.201869 g/L B. 0.435188 g/L C. 0.059919 g/L D. 0.294046 g/L E. 0.000713 g/LWhich of these compounds is most soluble in water at pH 7.0? (Note that the non- ionized forms are shown, and remember that ionization will impact solubility!) ( CH3-CH2-CH2-CH2-NH2 CH3-CH₂-CH₂-CH₂-CH3 O CH3-CH2-CH2-CH2-CHO OCH3-CH₂-HCO-O-CH3 (an ester)When analyzing urine from a patient with kidney disease, which organicmolecules might be detected? Explain. Which biochemical test will be the most appropriate for detection of those molecules?
