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TLS Online TPP Program

#Question id: 4125

Which of the following are features of the wobble hypothesis?

#Section 3: Genetics, Cellular and Molecular Biology

  1. A naturally occurring tRNA exists in yeast that can read both arginine and lysine codons.

  2. A tRNA can recognize only one codon.

  3. Some tRNAs can recognize codons that specify two different amino acids, if both are nonpolar.

  4. The “wobble” occurs only in the first base of the anticodon.

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TLS Online TPP Program

#Question id: 158

#Section 2: General Biology

At the isoelectric pH of a tetrapeptide:
TLS Online TPP Program

#Question id: 159

#Section 2: General Biology

The chirality of an amino acid results from the fact that its alpha carbon:
TLS Online TPP Program

#Question id: 161

#Section 2: General Biology

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

#Question id: 162

#Section 2: General Biology

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

#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:
TLS Online TPP Program

#Question id: 165

#Section 2: General Biology

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