What is an enzyme?

An enzyme is a biological catalyst that enables reactions to occur by decreasing the activation energy they need. Not only would certain reactions not take place without the enzyme, they are also important in speeding up reactions, which is vital for certain biological processes and for the survival of organisms. An enzyme has an active site, which is specific for a given substrate, which allows it to catalyze only the reactions it's tailored for. 

KF
Answered by Kristina F. Biology tutor

2468 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

How to do a genetic cross to work out the offspring phenotype probabilites?


What are three adaptations in a leaf for photosynthesis?


What is the difference between mitosis and meiosis?


How is immunity reached after a vaccine is given? Include the roles of both T cells and B cells.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences