Carbohydrates: any of various neutral compounds of carbon, hydrogen, and
oxygen (such as sugars, starches, and celluloses) most of which are formed by
green plants and which constitute a major class of animal foods
Monosaccharides: a sugar that is not decomposable into simpler sugars by hydrolysis, is classed as
either an aldose or ketose, and contains one or more hydroxyl groups per molecule —called also
simple sugar
Polysaccharides: a carbohydrate that can be decomposed by hydrolysis into two or more molecules
of monosaccharides; especially : one (such as cellulose, starch, or glycogen) containing many
monosaccharide units and marked by complexity
Proteins: A molecule composed of polymers of amino acids joined
together by peptide bonds. It can be distinguished from fats and
carbohydrates by containing nitrogen. Other components include
carbon, hydrogen, oxygen, sulphur, and sometimes phosphorus.
Aminoacids: The building block of protein in which each is coded for by a codon and linked together
through peptide bonds.
Nucleic Acids: any of various complex organic acids (such as DNA or
RNA) that are composed of nucleotide chains
Nucleotides: : any of several compounds that consist of a ribose or deoxyribose sugar joined to a
purine or pyrimidine base and to a phosphate group and that are the basic structural units of nucleic
acids (such as RNA and DNA)
Lipids: A fatty or waxy organic compound that is readily soluble in nonpolar
solvent but not in polar solvent. Its major biological functions involve energy
storage, structural component of cell membrane, and cell signaling.
Fatty acids: any of the saturated or unsaturated monocarboxylic acids (such as palmitic acid) usually
with an even number of carbon atoms that occur naturally in the form of glycerides in fats and fatty
oils
Saturated: A fatty acid, such as stearic acid, whose carbon chain contains no unsaturated linkages
between carbon atoms and hence cannot incorporate any more hydrogen atoms.
Unsaturated: A fatty acid, such as oleic acid, whose carbon chain possesses one or more double or
triple bonds and hence can incorporate additional hydrogen atoms.
Monomere: The simplest unit, or the
repeating unit, of a polymer.
Supplement A monomer may
combine with another monomer
through chemical bonds to form a
larger molecule, as in a polymer.
Polymere: A compound made up of
several repeating units (monomers), are
made from monomers linked by
chemical bonds. They are produced by
polymerization, and occur either
naturally or synthetically.