$(1)$ Like chemical catalysts enzymes reduce the activation energy of bio process $\Rightarrow$ This is correct statement.

$(2)$ Enzymes are polysaccharides $\Rightarrow$ This is incorrect statement because enzymes are protein in nature

$(3)$ Enzymes are very specific for a particular reaction and substrate $\Rightarrow$ This is correct statement.

$(4)$ Enzymes are biocatalyst $\Rightarrow$ This is correct statement.