I thinking the answer was for some genes, both alleles express together. Others combine to give an average phenotype....
Bile neutralises the stomach acid.
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. ... The enzyme's active site binds to the substrate.
Answer: I think it might be C
Explanation:
Because it tell you the same info that was in the text then in the question.