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TLS Online TPP Program

#Question id: 2104

Peripheral membrane proteins:

#XL - S Microbiology

  1. are generally noncovalently bound to membrane lipids.

  2. are usually denatured when released from membranes.

  3. can be released from membranes only by treatment with detergent(s).

  4. may have functional units on both sides of the membrane.

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TLS Online TPP Program

#Question id: 160

#XL - T Zoology

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

#Question id: 161

#XL - T Zoology

Two amino acids of the standard 20 contain sulfur atoms.  They are:
TLS Online TPP Program

#Question id: 162

#XL - T Zoology

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

#Question id: 163

#XL - T Zoology

Which of the following statements about cystine is correct?
TLS Online TPP Program

#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:
TLS Online TPP Program

#Question id: 165

#XL - T Zoology

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