The lock-and-key mechanism refers to
a: the complementary shapes of an enzyme and a substrate
b: the attractive forces between an enzyme and a substrate
c: the ability of an enzyme to lower the activation energy of a reaction
d: the ability of a enzyme to "unlock" the products of a reaction

Accuracy in the translation of mrna into the sequence of amino acids in a polypeptide depends on specificity in which of the following? 1) binding of ribosomes to mrna 2) shape of the a and p sites of ribosomes 3) attachment of amino acids to trnas 4) bonding of the anticodon the codon and the attachment of amino acids to trnas