Like chemical catalysts enzymes reduce the activation energy of bio processes.
Enzymes are polysaccharides.
Enzymes are very specific for a particular reaction and substrate.
Enzymes are biocatalysts.
Solution
Almost all known enzymes are proteins and not carbohydrates. So, enzymes are not polysaccharides. Enzymes reduce activation energy of bio process and are very set specific for a perticular reaction and substrate. Enzymes are also acts as biocatalysts.