A substrate is a surface or substance in which an organism can attach itself to support its growth. A synonym for substrate is substratum.

Substrate-level phosphorylation can best be describe as the direct transfer of phosphate from one substrate to another. Oxidative phosphorylation is different from substrate level phosphorylation is that it generates ATP by using a proton motive force.

At the active site. The substrate is held in the active site by "weak interactions" such as hydrogen bonds and ionic bonds.

tryptophan tyrosine phenanylalanine

In the induced-fit model of enzymes, a substrate associates itself with which part of an enzyme?