Ibuprofen is a drug used to manage mild pain, fever, and inflammation. It is a chiral drug, and only the S enantiomer, whose specific rotation is +25.0°, is effective. The R enantiomer exhibits no biological activity. If a particular process is capable of producing ibuprofen in 84% enantiomeric excess of the S enantiomer, then what is the specific rotation of that mixture? What is the percentage S enantiomer in that mixture?

Researchers discover a new amino acid. Its R-group exclusively has hydrogen and carbon atoms. What behavior will this amino acid show? O Relative to the amino acids found in organisms, its interactions with water will be very high. It is hydrophilic. Relative to the amino acids found in organisms, its interactions with water will be intermediate. It is hydrophobic.

A.Is glycine polar? How can you tell? B. Does a molecule have to be polar in order to be chiral? If yes, explain why chirality follows from polarity; if no, show a simple molecule that is a counterexample. C.Build alanine (chemical formula: H2NCH(CH3)COOH), which is another amino acid. Is alanine polar? Is its shape around the “central” carbon significantly different from glycine?

6. Is this amino acid L- or D-, and how can you tell? Н -ŅH3 CH3 a. D-, because all amino acids are D. b. D-, because the amine is on the right. c. D-, because the amine is on the left. d. L-, because the amine is on the left.

Which amino acids have R groups with an additional chiral carbon? - Cysteine - Isoleucine - Threonine -Histidine - Tryptophan - Tyrosine - Methionine

Two of the amino acids have two chiral centers. Give the name and three-letter abbreviation of each. Enter your answers separated by a comma.Enter your answers separated by a comma.

On the basis of polarity, what are the four types of side chains found in the standard amino acids? Draw one of the standard amino acids as an example and indicate the types of side chains

With the exception of Glycine, all amino acids are chiral. Two amino acids have actually more than one chiral carbon: draw the structures of these amino acids at pH 7.0 and indicate the locations of the chiral centers in each of these structures.