Transcript Research

Lipids
 Commonly known as:
 Fats
 Oils
 Waxes
1. Organic Compound
Made up of carbon
Feels waxy or oily to the touch
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Function of a lipid:
a. Stores energy ~ long term
b. Main component of our cell
membranes
c. Insulates our body
d. Protects our major organs
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Lipids are made up of:
C , H and O
Same set of elements found in carbs
……unused carbs get stored
as body fat.
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Like carbohydrates and proteins, lipids
are made up of repeating units. The
repeating units in lipids are called:
-Triglycerides
“3”
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Many bonds need to be broken
-need to add:
water and enzymes
“lipase”
H2O
Lipds are then broken down
by the process “Hydrolysis”
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Lipids contain more energy per gram than
any other food source…very calorie loaded
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Butter
Types of lipids:
1. FATS
a. Are solid at room temperature
b. Found in animal products
Milk
Lard
Meat
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Egg yolks
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c. Known as “saturated” fats
-unhealthy because they contain:
-heart unhealthy “cholesterol”
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2. OILS
a. Normally liquid at room temperature
b. Found in plant products
Nuts
Vegetable
Oils
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Olives
Margarine
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c. Known as “unsaturated” fats/lipids
-contains same amount of calories as
saturated but are more healthier
for you because they do not
contain cholesterol.
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3. Waxes
a. Found in plants and animals
b. Form of protection
-covers all major organs
c. Waterproof structures
Cuticle on leaves
Earwax
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4. Phospholipids
a. Used to create our cell membranes.
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Two test for the presence of lipids:
1. Brown Bag Test
-leaves a translucent spot
-light passes through it
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Yummy!!!!!!!
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2. Solubility
Test
-lipids are soluble
in lighter fluid BUT
insoluble in
water.
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Nucleic Acids
-4th Organic Compound
-made up of carbon
H, O, N and Phosphorus
-There are only two type:
-DNA
-RNA
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Function of nucleic acids:
-To store and transmit our genetic
code.
Nucleic Acids are made up of many
repeating units known as nucleotides.
To Be Continued in a later chapter….
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