A ktup is composed of ___residues for protein sequences and _____ residues for DNA sequences.

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#Question id: 158

#Section 2: General Biology

At the isoelectric pH of a tetrapeptide:

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#Question id: 159

#Section 2: General Biology

The chirality of an amino acid results from the fact that its alpha carbon:

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#Question id: 161

#Section 2: General Biology

Two amino acids of the standard 20 contain sulfur atoms.  They are:

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#Question id: 162

#Section 2: General Biology

All of the amino acids that are found in proteins, except for proline, contain a(n):

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#Question id: 164

#Section 2: General Biology

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:

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#Question id: 165

#Section 2: General Biology

Amino acids are ampholytes because they can function as either a(n):