Biological molecules:

Carbohydrates
Lipids
Proteins

Carbohydrates:

Sugars:

Monosaccharides:

Glucose {Photosynthesis}
Fructose {Sweeter than glucose, isomer of glucose}

Disaccharides:

Two monosaccharides bonded to each other
Sucrose{Glucose and fructose bonded}
Monosaccharides and Disaccharides are sources of energy

Polysaccharides:

Storage of energy in the form of many monosaccharides bonded to each other(like starch)
Good for structural building(like cellulose)

Glycogen:

Used to store energy in humans {short term storage, more branches than cellulose}
Made of leftover glucose

Lipids:

Do not dissolve in water.
Made of mainly glycerols and fatty acids.
3 fatty acids and 1 glycerol is triglyceride
Long term storage of energy

If fatty acids are saturated then they are saturated fatty acids
Trans fats unsaturated fatty acids that are "straight" instead of "kinking"
Omega 3 fatty acids are fatty acids unsaturated at 3 position {essential fatty acid}

Phospholipids:

Triglyceride but one fatty acid is replaced by phosphate group.
Makeup cell membrane walls, phosphate is polar{hydrophilic} and fatty acids are hydrophobic

Steroids:

Lipids made of 4 interconnected carbon rings.
Cholesterol{steroid} binds with phospholipids to form cell wall.
Lipid hormones are also steroids

Proteins:

Enzymes regulate chemical processes
Antibodies are part of the immune system
Protein endorphins do brain stuff
Proteins are comprised of 20 different types of amino acid

Amino acids:

Amine bonded to carbon bonded to carboxylic acid and having side chain.
Amino acids can form long chains called polypeptides.
Proteins are formed when polypeptides connect/"fold" in various structures

Essential amino acids:

Histidine , isoleucine , leucine , lysine , methionine , phenylalanine, threonine , tryptophan , valine