Question

Identify the correct statement regarding enzymes.

• A. Enzymes are specific biological catalyst that possess well defined active state.
• B. Enzymes are normally heterogeneous catalyst that are very specific in their action.
• C. Enzymes are specific biological that cannot be poisoned.
• D. Enzymes are specific biological catalyst that can normally function at very high temperature $(T\simeq 1000K).$

Answer 1

The correct option is A Enzymes are specific biological catalyst that possess well defined active state.

Enzyme Catalysis - These are catalysts in the living system. Enzymes are substances which by their their presence, alter the rate of anybiological event. These are mainly proteins, and enzyme action is structure specific.

Enzyme catalysis is the increase in the rate of a chemical reaction by the active site of a protein. The protein catalyst (enzyme) may be part of a multi-subunit complex, and/or may transiently or permanently associate with a Cofactor (e.g. adenosine triphosphate).

Catalysis of biochemical reactions in the cell is vital due to the very low reaction rates of the uncatalysed reactions. A key driver of protein evolution is the optimization of such catalytic activities via protein dynamics.
They decrease activation energy by providing alternate pathway (enzyme reacts with the substrate to form an intermediate ES complex, which would be impossible in the absence of the enzyme) for the process.