Recall Molecule: when two or more atoms join together (ex O2) Compounds: Two or more different elements chemically combined to form a new substance (ex. NaCl – sodium chloride, table salt) Some of these are small, just a few atoms, some molecules are very large.

Biomolecule examples

Folic acid

Often contain minerals we need

Some molecules are broken down, some stay as is

Caffeine

https://www.youtube.com/watch?v=4YOwEqGykDM https://www.youtube.com/watch?v=hbuCmO8Bwhs

Other Chemicals and brain Alcohol

Biomolecules All of these are examples of biomolecules Molecules found in living organisms Four main categories Carbohydrates Lipids Proteins Nucleic acids

Biomolecules They are often called macromolecules because of their large size. They are also called polymers because they are made from identical or similar building blocks strung together (monomers).

Biomolecules Dehydration reaction builds long polymers out of multiple monomers Hydrolysis breaks a polymer into the monomers

Carbohydrates Sugar molecules (saccharide) Monosaccharides are single sugars that can be combined to form disaccharides and polysaccharides

Lipids are water insoluble (hydrophobic, or water-fearing) compounds are important in long-term energy storage contain twice as much energy as a polysaccharide

Proteins Proteins are involved in nearly every dynamic function in your body very diverse, over 10,000 different proteins, each with a specific structure and function, in the human body Proteins are composed of differing arrangements of a common set of just 20 amino acid monomers

Nucleic Acids DNA and RNA are examples Deoxyribonucleic acid Ribonucleic acid Provide the instructions for the cell to make proteins so the cell can function.

Snack Foods HW Find the label of a snack food, do some research on each of the ingredients Leave the back empty for now