Digestive enzymes, such as pepsin, often denature as food moves through the different parts of the digestive system. why does this occur? changes in ph often alter the shape of the active site. changes in ph often alter the shape of the substrate. enzymes from previous reactions run out of substrate and stop reacting. enzymes are consumed before they reach the next stage of digestion.

Winston's baseball team had the bases loaded in the last inning when his friend freddie watched three straight pitches go by without swinging and was called out on strikes out to end the game. how can winston demonstrate responsible behavior in this situation? a. ask the coach sarcastically, in front of the team, if he gave freddie the take sign b. confront freddie and let him know that the team would have won if he could hit c. ignore freddie both after the game and the next day at school d. tell freddie that no one is perfect and to keep his confidence up