Stuck on a problem? Get great tutoring at an affordable price with Chegg. Click here to join and get your 1st 30 minutes Free!


From Biology-Online Dictionary
Jump to: navigation, search


noun, plural: substrates


A substratum or an underlying stratum.


The substance acted upon by an enzyme.


The earthy material in which an organism lives, or the surface or medium on which an organism grows or is attached.

(marine biology)

The material (e.g. dirt, rocks, sand, gravel) in the bottom of a marine habitat, or one that forms the bed of a stream (or of an aquarium); the source of food for some microorganisms.


Word origin: L. Stratum = layer.

Related terms: substrate inhibition, substrate-level phosphorylation, substrate specificity, suicide substrate, enzyme-substrate complex.

Synonym: substratum.