Predict how each of the 20 standard amino acids would react to the ninhydrin test and the sulfur test.
Predict how each of the 20 standard amino acids would react to the ninhydrin test and...
Why does ninhydrin stain the skin blue? a. Skin contains amino acids. b. Ninhydrin is blue-colored c. Ninhydrin turns blue when warmed Pleas explain your answer.
Can a standard glycine and protein solutions look identical after a ninhydrin test is complete? Can a standard cysteine and protein solutions look identical after a sulfur test is completed?
Amino acids are amphoteric because they A) react with neither acids nor bases. B) react only with acids. C) with both acids and bases. D) react with only bases. Which of the following peptides is not cleaved by chymotrypsin?
5. Which of the 20 standard amino acids are a. Cyclic b. Aromatic C. Sometimes charged at physiological pH d. Technically not hydrophobic, polar, or charged e. Basic f. Acidic . Sulfur containing 6. Estimate the net charge of a His-His-His-His tetrapeptide at pH 6.0 7. The artificial non-nutritive sweetener aspartame is a dipeptide with the sequence Asp-Phe. The carboxyl terminus is methylated. Draw the structure of aspartame at pH 7.0. Sketch a titration curve for the amino acid cysteine,...
When the amino acids alanine (C3H7NO2 ) and glycine (C2H5NO2 ) chemically react with each other, their products are water(H2O) and a polypeptide known as glycylalanine. If there are no other products, what must be the molecular formula of glycylalanine?
For each of the amino acids, predict the direction of migration during electrophoresis at the given pH. Amino acid Isoelectric point, pl histidine 7.59 7.59 aspartic acid 2.77 7.25 pH The direction of migration for histidine is toward the negative electrode O toward the positive electrode O no movement The direction of migration for aspartic acid is toward the negative electrode O no movement toward the positive electrode
short answer plase 3. What is the role of Conc. H2SO4 in Molisch's reagent test? bond in proteins. 4. The positive Biuret test indicates the presence of "Speptible. 5. Why would amino acids give a negative result in the Biuret Test for Proteins? 6. Oxytocin is a hormone; it is a 9-amino acid peptide. Predict the results (+ or -) of the following tests on oxytocin: Biuret test: Ninhydrin test: 7. Describe the structural difference between saturated fatty acids and...
How are the correct amino acids brought to the rib... How are the corect amino acids brought to the ribosomes for protein synthesis? The amino acids are synthesized directly at the ribosomes by the hydrolysis of dietary protein. OAmino acids are carried in the interior of the DNA double helix, then carried to the ribosomes. OAcetyl-CoA carries the amino acids that match the codon on DNA. O Transfer RNA molecules, whose anticodon loop contains the complementary sequence of an MRNA...
Humans have what are called essential versus non-essential amino acids. There are also "non-standard" amino acids that exist. What is the difference between these groups?
QUESTION 29 How long would a mRNA coding for a protein with 106 amino acids be if it had 5' and 3' UTRs of 30 bases each? (Assume stop codon is part of the last exon)