BMS1041 amino acids

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

  • 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 translated from specific DNA sequences
  • are hydroxylated forms of proline and lysine, thus not encoded by the genetic code
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2. Which component of the general structure of AA is acidic?

  • R-group
  • NH3+
  • COO-
  • H

3. Proline:

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

4. Desmosine is an AA...

  • formed of four hydroxyproline and hydroxylysine residues
  • formed of four lysine residues
  • formed of four glycine residues
  • formed of four hydroxylysine residues
  • formed of four hydroxyproline residues

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

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

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