Biology 9700 · AS & A Level · Carbohydrates and lipids

Carbohydrates and lipids — practice question

Phospholipids are assembled in much the same manner as triglycerides. One sample contained six phospholipid molecules. • The molecular weight of a phosphate ion is $95\,\text{g mol}^{-1}$. • The molecular weight of each separate fatty acid in this sample was determined to be $282\,\text{g mol}^{-1}$. • The molecular weight of glycerol is $92\,\text{g mol}^{-1}$. • The molecular weight of water is $18\,\text{g mol}^{-1}$. What is the molecular weight of the sample in $\text{g mol}^{-1}$?

  • A2598
  • B4182
  • C4506
  • D4830

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