With regard to enzymes, what can be said to be the relationship between the substrate and the active site?

They work like a lock and key. Each enzyme is designed to fit into a specific substrate. Well let me start by explaining what an enzyme is and then a subtrate. An enzyme is a protein that speeds up the chemical reaction in a living organism. An enzyme acts as a catalyst for specific chemical reactions, converting a specific set of reactants called substrates into specific products.

Ithink option a is correct because you cannot donate a different blood group than yours because it won't match.option a says betsy can donate to mark. they have the same blood group so donation can happen.