Questions asked by Ibrahim K.

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• Calculate the mass of Ca(NO3)2 needed to prepare 3.5 L of a 0.8 M solution?
  
• What organ is responsible for the absorption of nutrients derived from the foods we eat?
  
• Are all cell membranes selectively permeable?
  
• Why are lipids good for us?
  
• Why are proteins considered polymers?
  
• What is an enzyme substrate complex?
  
• What is a gram stain and when is it useful?