BMS1041 amino acids

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1. 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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2. Amongst AA's commonly found in proteins Glycine is unique as:

  • high concs are not found in alpha helices
  • all the things
  • the side chain contains only one hydrogen
  • it is commonly found in beta turns
  • it does not contain a chiral alpha carbon

3. Desmosine is an AA...

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

4. The AA with aromatic R groups are characterised by:

  • an aromatic ring structures
  • an aromatic ring structure which gives these AA their characteristic UV spectra
  • a high carbon content
  • a strong flagrance, as referred to by aromatic

5. The AA with 'non-polar' aliphatic R groups are characterised by:

  • high levels of carbon and hydrogen in the side chain
  • high levels of carbon and oxygen atoms in the side chain
  • high levels of hydrogen bonding between carbon and hydrogen atoms in the side chain
  • high levels of acidic or basic groups

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