"The search is on as the evidence from ethnobotany reveals the genetic potential of wild plants to produce chemicals of medical significance. The scientists exploring the medicinal use of plants by indigenous peoples throughout the world are engaged in

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

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

c. the initial amount of money placed in the savings account

digestion

it excretes wastes