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Ethanol

Glucose

Hydroxyl

Examples of biomolecules with hydroxyl group

  • hydroxyl is a part of the biomolecules alcohols (like ethanol) and sugars (like glucose and fructose)
  • these substances dissolve in water by forming bonds

Properties of the Hydroxyl group

  • oxygen atom is more electronegative than hydrogen atom, so it attracts electrons
  • hydroxyl group is polar
  • this results in hydroxyl group being capable of forming hydrogen bonds
  • because all alcohols contain hydroxyl, they will almost always disolve in water by forming hydrogen bonds
  • this makes them a hydrophilic substance

Web Cites:

https://en.wikipedia.org/wiki/Hydroxyl

http://study.com/academy/lesson/hydroxyl-group-definition-structure-quiz.html

http://www.britannica.com/science/hydroxyl-group

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