Explanation:
Adsorption is a process in which molecules, ions or particles of a substance adhere to the surface of another substance. It is a physical phenomenon and cannot explain all the chemical reactions that occur.

a) Heterogeneous catalysis:
Heterogeneous catalysis involves the surface adsorption of reactant molecules on the catalyst surface, followed by their reaction to form products. The catalyst provides a surface for the reactants to come together and react, and the reaction occurs on the surface of the catalyst. Thus, adsorption plays a crucial role in heterogeneous catalysis.

b) Catalytic action of bioenzymatic molecules:
Bioenzymatic molecules are proteins that catalyze chemical reactions in living organisms. They have a specific structure that allows them to bind to specific molecules and catalyze reactions. The catalytic action of bioenzymatic molecules is not due to adsorption but due to the specific structure of the protein molecules.

c) Decolorization of sugar:
Decolorization of sugar is a process that involves the removal of color from sugar solutions by adsorption onto a suitable adsorbent such as activated carbon. The adsorbent provides a surface for the color molecules to adhere to, leading to their removal from the solution.

d) Chromatography:
Chromatography is a technique used to separate and analyze mixtures of substances. It involves the adsorption of the mixture onto a stationary phase, followed by its separation based on the differences in adsorption and other chemical properties of the components. Adsorption plays a crucial role in chromatography.

Conclusion:
Thus, the catalytic action of bioenzymatic molecules cannot be explained by adsorption, as it is due to the specific structure of the protein molecule.