The type of membrane transport that uses ion gradients as the energy source is:

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#Question id: 155

#XL - T Zoology

Which amino acids are linked in phenylalanylglycine?

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#Question id: 156

#XL - T Zoology

What is the N-terminal for the pentapeptide Val-Ile-Glu-Arg-Tyr?

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#Question id: 158

#XL - T Zoology

At the isoelectric pH of a tetrapeptide:

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#Question id: 159

#XL - T Zoology

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

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#Question id: 160

#XL - T Zoology

Of the 20 standard amino acids, only ___________ is not optically active.  The reason is that its side chain ___________.

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#Question id: 161

#XL - T Zoology

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