bob you are right about the secondary metabolites, being not directly involved
with growth, but chlorophyll is NOT a primary metabolite. they are compounds
like PEP, RUBP and glucose. chlorophyll actually is a secondary metabolite..
>> They're compounds that unlike, say, chlorophyll, don't have any direct
>> function in growth or development of the plant - e.g. terpenes, phenols,
>> alkaloids, etc., or to put it another way, what we often refer to as
>> "natural products" (such as latex or cocaine).