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lipid
hydrophobic molecules made by the dehydration reaction of glycerol molecules +3 fatty acids yielding a lipid and 3 water molecules.
amino acid
building blocs of proteins each containing a carboxyl group and an amino group.
enzymes work in what kind of theory and do what
lock in key theory and speed up chemical reactions
isomer
2 different molecules that have the same chemical formula
lipid fats can be
saturated or unsaturated
how many types of amino acids are there
20
building blocks of DNA and RNA
what determines the properties of a protein
type, # and order of amino acids
saturated fats
no double bonds between carbon atoms
hydrophilic
molecules that attract water
3 components of DNA that comprise the double helix are
deoxyribose, phosphate group, nitrogenous base
unsaturated fats
at least 1 double bond between carbon atoms
type of bond formed when amino acids link together ejecting a water molecule
peptide bond (makes proteins). these form peptide protein structures
4 types of nucleotide bases are
adenine, cytosine, guanine, thymine
steroid
a lipid molecule with 4 fused carbon rings
enzymes are a special class of proteins that may act as a _____
catalyst speeding up chemical reactions
what does an enzyme do
lowers the activation energy of a reaction