Giving almost 20 ! the creature in the photograph is a protist, which is composed of only one cell. this means that a protist a) cannot reproduce. b) is a living organism. c) cannot survive in water. d) gets energy directly from sunlight.

this protocol provides a detailed procedure for agarose-based ip to purify and enrich the protein of interest.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products