Lipids (a.k.a. fats)

Dehydration synthesis (here we go again!! Same vocabulary over

and over!!)• Lipids also contain C, H, O

elements from CHNOPS

• contain units of 1 molecule glycerol linked to 3 fatty acids (called a triglyceride) through dehydration synthesis (makes water)

Lipids

• A Lipid is called a triglyceride and it’s formed by dehydration synthesis (remove water) and it is broken down by hydrolysis (adding water)

Lipid diagram (triglyceride)

Formation of a triglyceride (lipid)

• Dehydration synthesis occurs & removes water

Types of Lipids

• saturated fats-animal fats that are solids at room temperature (contain single bonds)-solids-ex. Butter (hint: to remember saturated is single bonds think of the “s” in saturated and the “s” in single)

Types of Lipids

• unsaturated fats- oils from plants (contain double bonds)-liquids at room temperature

• ex. Olive oil

Unsaturated fats contains double bonds while saturated fats contain single bonds in the fatty acid chain

Types of Lipids

• cholesterol-lipid found in animal foods

• helps build cell membranes• Note: not all cholesterol is bad, you

do need some to build your cells but you don’t want a lot because it can lead to blocked arteries, etc.

Purposes of Lipids

• provide long term energy storage, insulation, and protection

• general sources of lipids-fats, oils, waxes, meat, fish, poultry, dairy

products (30 % of daily calorie intake)