Other questions in this quiz

2. The AA's hydroxyproline and hydroxylysine...

  • are translated from specific DNA sequences
  • are hydroxylated forms of proline and lysine, which require vit C as an enzyme cofactor for their synthesis
  • are hydroxylated forms of proline and lysine, which require vit C as an enzyme cofactor for the synthesis and are found at high levels in collagen
  • are hydroxylated forms of proline and lysine, thus not encoded by the genetic code

3. The AA's valine, leucine and isoleucine have the following characteristics in common?

  • they contain a basic side chain
  • they are branched non polar aa's
  • none of the above
  • they contain a polar side chain
  • they contain an acidic side chain

4. The amino acids with 'acidic R groups' are characterised by?

  • side chains with a negative physiological pH
  • side chains with a positive physiological pH
  • the AA's aspartate and glutamate. The negatively charged side chains can form electrostatic interactions with positively charged basic side chains.
  • the AA's lysine and arginine. The negatively charged side chains can form electrostatic interactions with positively charged basic side chains

5. Proline:

  • Commonly found in beta turns
  • always hydroxylated to hydroxyproline
  • commonly found in alpha helices
  • never found in collagen
  • is an uncommon AA

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