What are competitive inhibitors?

Explanation

Competitive Inhibitor :
1. Molecules that resemble the shape of the substrate and may compete to occupy the active site of enzyme are known as competitive inhibitors.
2. Eg : The enzyme that catalyses the reaction between carbon di oxide and the CO2 acceptor molecule in photosynthesis, known as ribulose biphosphate carboxylase oxygenase (RUBISCO) is competitively inhibited by oxygen /carbon- di - oxide in the chloroplast.
The competitive inhibitor is malonate for succinic dehydrogenase.