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Biology AP

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Chemical Background

Functional Groups

R stands for "rest of the compound"
Name (memorize) Structure (memorize)
Amino group          H
R-N<
         H
Carbonyl Groups Includes Ketones and Aldehydes
Ketone R
|
C=O (in the middle of a chain)
|
R
Aldehyde R-C=O
      \
       H
Carboxyl Group R-C=O
      \
       OH
Hydroxyl Group R-OH (aka alcohols)
Sulfhydryl Group R-SH
Phosphate Group    O
    |
O=P-O-R
    |
   O

Lipids

Question (memorize) Answer (memorize)
Lipids in General Hydrophobic and insoluble in water; includes fats, oils, steroids, and phospholipids
Fat in General Energy storage; three fatty acids connected to OH group of a glycerol
Saturated Fat No double bonds, "animal fat," associated with heart disease
Unsaturated Fat one or more double bonds, fewer H molecules, "plant fat"

 

 

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