(a)
One enzyme catalyses only one reaction. This is highly specific action of enzyme. Sucrose ($C_{12}H_{22}O_{11})$ is hydrolysed by invertase whereas, another sugar maltose ($C_{12}H_{22}O_{11}$) is hydrolysed by maltase.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.