$\beta$ -Lactamase Is an Enzyme That Catalyzes the Hydrolysis of the the Antibiotic

$\beta$ -lactamase is an enzyme that catalyzes the hydrolysis of the antibiotic penicillin.Infrared spectra taken of penicillin free in solution and penicillin bound to the active site of the enzyme have revealed that certain bonds are stretched to a greater extent when penicillin is bound to the enzyme.Explain how this observation relates to the concept of enzyme-induced strain.