Chemistry Packet Presentation Number 6 Functional Groups

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. 64-65).

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

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

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

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

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

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

Functional Group -PO Name of Functional Group: Phosphate 4 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