#Question id: 161
#XL - T Zoology
Two amino acids of the standard 20 contain sulfur atoms. They are:
#Question id: 162
#XL - T Zoology
All of the amino acids that are found in proteins, except for proline, contain a(n):
#Question id: 163
#XL - T Zoology
Which of the following statements about cystine is correct?
#Question id: 164
#XL - T Zoology
The uncommon amino acid selenocysteine has an R group with the structure —CH2—SeH (pKa = 5). In an aqueous solution, pH = 7.0, selenocysteine would:
#Question id: 165
#XL - T Zoology
Amino acids are ampholytes because they can function as either a(n):
#Question id: 166
#XL - T Zoology
For amino acids with neutral R groups, at any pH below the pI of the amino acid, the population of amino acids in solution will have: