NEETBotanyBiomolecules (B)
What is an active site in an enzyme?
Options
- AThe substrate
- BThe pocket or crevice into which the substrate fits
- CThe amino acid sequence
- DThe secondary structure
Correct answer
B. The pocket or crevice into which the substrate fits
Step-by-step solution
The backbone of the protein chain folds upon itself, the chain criss-crosses itself and hence, many crevices or pockets are made. One such pocket is the ‘active site’. An active site of an enzyme is a crevice or pocket into which the substrate fits. Thus enzymes, through their active site, catalyse reactions at a high rate.