From left to right: Photosynthesis , Respiration
Answer:
A is the substrate and B is the protein
Explanation:
Substrate: thing that is the initial part of a protein reaction
B is the thing that MODIFIES the substrate, the protein.
A higher number indicates a higher concentration. The change will be positive where potato cylinders have increased in mass. Where the mass of potato cylinders has decreased, the change will be negative.