In which process do some macromolecules get assembled from smaller components and other macromolecules get degraded to yield energy?

Digestion including hydrolysis

Explanation:

In the process of digestion, bigger food molecules are broken down into smaller macro molecules. These macro-molecules in later stage are absorbed or accumulated by cell and further broken down to release energy. It is during the process of hydrolysis,  

Where big macro-molecules are broken into smaller polymers and further into monomers thereby releasing energy. This chemical process is assisted by an enzyme in the presence of water molecules.  

answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.

b.