1. Chemistry Packet Presentation
Number 6
Functional Groups

2. Question!
6. Functional groups can modify the properties of organic molecules. In the table below, indicate whether each functional group is polar or nonpolar, and hydrophobic or hydrophilic. Which of these fuctional groups are found in proteins? Use the functional group information in chapter 4 of your text (pg ).

3. Question! Functional Group Name of Functional Group
Function of the Group
Polar or Non-Polar
Hydrophobic or Hydrophilic
Found in all Proteins
Found in many Proteins
Found in Lipids
* -OH
* -CO
* -COOH
* -NH2
* -SH
* -PO4

4. Functional Group -OH Name of Functional Group: Hydroxyl
Function of the Group:
Attracts water molecules o help dissolve organic compounds
Polar or Non-Polar: Polar
Hydrophobic or Hydrophilic: Hydrophilic
Found in All Proteins: No
Found in Many Proteins: Yes
Found in Lipids: No

5. Functional Group -CO Name of Functional Group: Carbonyl
Function of the Group:
Structural isomers with different properties
Polar or Non-Polar: Polar
Hydrophobic or Hydrophilic: Hydrophilic
Found in all Proteins: Yes
Found in many Proteins: No
Found in Lipids: Yes

6. Functional Group -COOH Name of Functional Group: Carboxyl
Function of the Group:
Covalent bonds between oxygen and hydrogen ten to dissociate reversibly
Polar or Non-Polar: Polar
Hydrophobic or Hydrophilic: Hydrophilic
Found in all Proteins: Yes
Found in many Proteins: No
Found in Lipids: No

7. Name of Functional Group: Amino Function of the Group:
-NH 2
Name of Functional Group: Amino
Function of the Group:
Acts as a base; can pick up a proton from the surrounding area
Polar or Non-Polar: Polar
Hydrophobic or Hydrophilic: Hydrophilic
Found in all Proteins: Yes
Found in many Proteins: No
Found in Lipids: No

8. Functional Group -SH Name of Functional Group: Sulfyhydryl
Function of the Group:
Can interact to stabilize protein structure
Polar or Non-Polar: Non-Polar
Hydrophobic or Hydrophilic: Hydrophobic
Found in all Proteins: No
Found in many Proteins: Yes
Found in Lipids: No

9. Functional Group -PO Name of Functional Group: Phosphate4
Name of Functional Group: Phosphate
Function of the Group:
Can transfer energy
Polar or Non-Polar: Polar
Hydrophobic or Hydrophilic: Hydrophilic
Found in all Proteins: No
Found in many Proteins: No
Found in Lipids: Yes