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Which of the following statements about aromatic amino acids is correct? (a) All are strongly hydrophilic. (b) Histidine's ring structure results in its being categorized as aromatic or basic, depending on pH. (c) On a molar basis, tryptophan absorbs more ultraviolet light than tyrosine. (d) The major contribution to the characteristic absorption of light at 280 nm by proteins is the phenylalanine R group. (e) The presence of a ring structure in its R group determines whether or not an amino acid is aromatic.

Which of the following statements about aromatic amino acids is correct? (a) All are strongly hydrophilic. (b) Histidine's ring structure results in its being categorized as aromatic or basic, depending on pH. (c) On a molar basis, tryptophan absorbs more ultraviolet light than tyrosine. (d) The major contribution to the characteristic absorption of light at 280 nm by proteins is the phenylalanine R group. (e) The presence of a ring structure in its R group determines whether or not an amino acid is aromatic.

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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Which of the following statements about aromatic amino acids is correct? (a) All are strongly hydrophilic. (b) Histidine's ring structure results in its being categorized as aromatic or basic, depending on pH. (c) On a molar basis, tryptophan absorbs more ultraviolet light than tyrosine. (d) The major contribution to the characteristic absorption of light at 280 nm by proteins is the phenylalanine R group. (e) The presence of a ring structure in its R group determines whether or not an amino acid is aromatic.
Transcribed Image Text:Which of the following statements about aromatic amino acids is correct? (a) All are strongly hydrophilic. (b) Histidine's ring structure results in its being categorized as aromatic or basic, depending on pH. (c) On a molar basis, tryptophan absorbs more ultraviolet light than tyrosine. (d) The major contribution to the characteristic absorption of light at 280 nm by proteins is the phenylalanine R group. (e) The presence of a ring structure in its R group determines whether or not an amino acid is aromatic.
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