refers to a class of molecules ranging from small sugar molecules to large polysaccharides
Monosaccharide
a carbohydrate monomer
Disaccharide
two monosaccharides joined together by a dehydration reaction
Polysaccharide
polymers of monosaccharides linked together by dehydration reaction
Starch
a storage polysaccharide in plants made of only glucose monomers (has one strand)
Glycogen
a storage polysaccharide in animals made of only glucose monomers (branched structure)
Cellulose
the most abudant organic compound on earth. forms tough cableike fibrils in the tough walls in plant cells
Chitin
used by insects and crustaceans to build their exoskeletons
Lipids
diverse compounds that are grouped together because they share one trait they mix poorly with water (ex oil and water)
Hydrophobic
water fearing
Fat
large lipid made from two kinds of smaller molecules: glycerol and fatty acid
Unsaturated
having less that the maximum number of hydrogens
Saturated
having the maximum number of hydrogens
Phospholipids
major component of cell membranes
Steroids
lipids whose carbon skeleton contains four fused rings
Cholesterol
common component in animal cell membranes
Anabolic steroids
synthetic varients of the male hormone testosterone
Protein
polymer constructed from amino acid monomers
Amino acids
acid that has an amino group and a carboxyl group
Peptide bond
covalent linkage between two amino acids in a polypeptids
Polypeptide
chain of amino acids
Denaturation
process that alters protiens
Primary structure
unique structure fo amino acids
Secondary structure
second level of protien structure. parts of a polypeptide
Alpha helix
Coiling of peptide chains
Pleated sheet
folding of peptide chains
tertiary structure
3 dimensional shape of a polypeptide
Quaternary structure
two or more polypeptides chains
Organic compounds
carbon based molecules
Hydrocarbons
combounds composed of only carbon and hydrogen
Carbon skeleton
chain of carbon atoms in an organic molecule
Isomers
compounds with the same formula but different structures
Functional group
assemblage of atoms commonly attached to the carbon skeleton of organic molecules and usually involved in chemical reactions
Hydophilic
water loving
Hydroxyl group
a hydrogen atom bonded to an oxygen atom which is in turn bonded to a carbon skeleton
Carbonyl group
a carbon atom atom linked by a double bond to an oxygen atom
Carboxyl group
carbon double bonded to an oxygen and also double bonded to a hydroxyl group
Amino group
composed of a nitrogen bonded to two hydrogen atoms and the carbon skeleton
Phospate group
consits of a phosphorus atom bonded to four oxygen atoms
Methyl group
consists of a carbon bonded to three hydrogens
Macromolecules
large biological molecules
Polymers
large molecules made of small molecules joined together
Dehydration reaction
a chemicla process in which tho moleciles become covalently bonded to each other withe the removal of a water molecule (dehydration reaction condensation dehydration sequence)
Hydrolysis
reverse dehydration. bonds break when water is added to them
Enzymes
specalized macromolecules the speed up chemical reactions in cells