What best explains the observation of an enzyme being selective in the reaction it catalyzes?
a. reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.
b. molecules and active sites vary in size; only properly sized molecules can fit.
c. there is a precise compatibility between an enzyme's active site and the substrate molecule.
d. specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.
e. active sites carry slight negative charges, while substrates tend to carry slight positive charges.

(drag each tile to the correct identify which questions can be answered by what can be answered by science or which cannot. -is it right or wrong to use genetic engineering to produce new food products? -what are the most common social settings that tend to produce accomplished artists? -if a new gene is added to the genome of a tomato species, will that species be more resistant to insects? -should humans use biotechnology to bring extinct organisms from the fossil record back to life? -do the types of organisms found in the fossil record appear in consistent sequences in different parts of the world? -are michelangelo's paintings more impressive than rembrandt's?