Answer:
Enzyme.
Step-by-step explanation:
Enzymes are bio catalyst that can increase the rate of a biochemical reaction. Enzymes are important for the cell metabolism, protein formation and digestion of a particular substance.
Gene may be defined as the functional segment of the DNA that codes for the particular protein. The gene are chemically reactive and forms the particular trait in presence of the enzyme. The enzyme catalysis the reaction and helps in the formation of the trait from the gene.
Thus, the answer is enzyme.