We are what we eat!

Did our Happy Meal contain

• Protein?
• Carbohydrates?
• Lipids?

Do you contain
proteins, carbohydrates, or lipids?

Hint: lipid=fat

All living things are composed of

• Proteins
• Carbohydrates
• Lipids
• Nucleic Acids

The 4 major macromolecules

Macromolecules

• Are organic, meaning they contain Carbon
• Are large polymers made up of small repeating subunits
• Are composed of CHONPS

Proteins

• In meats, eggs, dairy
• Build muscle, bone, hair, and nails
• Keep you full the longest

Carbohydrates

• Found in breads, wheats, and sugars
• Give you a lot of energy
• Easy to digest, so you will be hungry soon after you eat

Lipids - aka fats

• Found in oils, nuts, butter, lard
• Cushions and protects internal organs
• Stores energy for later use

Nucleic Acids

• NOT found in food
• Our genetic material - we inherit from our parents
• DNA and RNA

What happens to our food

• This morning you ate...
• It was broken down by your stomach (a muscle), and digested by enzymes (proteins) in your stomach acid

What happens to our food

• Large macromolecules (proteins, lipids, and carbs) were broken down into their smaller parts (C, H, O, N, S)
• These elements can then be reassembled to build more molecules that make up cells, which make up tissues, organs, organ systems, and thus you!

Chemical Reactions

• Dehydration Synthesis
• Extract water and build molecules

Chemical Reactions

• Hydrolysis
• Add water, and break large molecules down into their parts