What is the 'lock and key' hypothesis?

A reaction can only be catalysed (sped up) if an enzyme's active site matches the shape of its substrate molecules- the substrate fits into the active site like a key into a lock. This shape is highly specific, meaning one type of enzyme can usually only match with one type of substrate to catalyse a reaction in the same way that a key can only open one lock.

Answered by Emily E. Biology tutor

2298 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

How does the body respond to an increase or decrease in temperature to maintain homeostasis?


Explain how a protein is synthesised


Describe the changes in pupil size when light is shined into the eye. Explain why this happens.


What is the structure and function of a nerve cell?


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