Outline the lock and key mechanism of enzyme-controlled reactions

Enzymes are proteins that catalyse specific biological reactions in the body. These proteins have a specific 3D structure known as a teritary structure, with a specialised domain known as an 'active site' that is complementary to and specific for the substrate of the reaction they catalyse. This substrate binds the active site, like a key into a lock, allowing the reaction to proceed.

MJ

Related Biology GCSE answers

All answers ▸

Describe the process of natural selection


A student investigates phototropism in wheat seedlings. She cuts the tips off some of her seedlings. She leaves the seedlings in the window. Two days later the seedlings have bent towards the light. Describe and explain these findings.


During exercise changes happen at the skin involving blood vessels and sweat glands, describe these changes.


Discuss the advantages and disadvantages of using biofuels in the UK (4).