Week 1: Cell bio and biochem

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1. Isomers are...

  • structures with the same chemical formula and atomic arrangement, but different spatial arrangement.
  • structures with the same chemical formula but different atomic arramgement.
  • structures with the carbon atoms only.
  • structures with the same chemical formula and atomic arrangement.
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2. The sequence of amino acids will determine...

  • most but not all of the proteins 3D shape, and thus determine its function.
  • the peptide chain.
  • all of the proteins 3D shape.
  • the polypeptide chain.

3. How many residues constitute one turn of an alpha helix?

  • An α-helix has 3.1 residues per turn.
  • An α-helix has 2 residues per turn.
  • An α-helix has 3.6 residues per turn.
  • 3.7 residues per turn.

4. Non-polar or hydrophobic amino acids are...

  • able to form electrostatic bond with or interact with water.
  • polar.
  • unable to form any electrostatic bond with or interact with water.
  • always present in their fully charged state, and are able to form ionic bonds with other charged species within a cell.

5. Histidine is also considered...

  • polar, but can only partially charge at physiological pH.
  • nonpolar.
  • a peptide bond.
  • a hydrogen.
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