Question

9c enzymes
total questions: 10
worksheet time: 5mins
instructor name: richelene joseph

1. enzymes are proteins that have a three - dimensional shape that is specific to a particular substrate. environmental conditions can change the shape of the protein. what is the most likely result if the shape of the enzyme changes?

a) the enzyme will be able to bind to more diverse substrates than before
b) the substrate will change its shape to match the enzyme
c) the products made from the enzyme and the substrate will be changed
d) the enzyme will no longer be able to catalyze the reaction with the substrate

1. the graphs show the reaction rate for an enzyme across a range of temperatures and ph. based on these data, the enzyme functions best at what temperature and ph?

a) temperature of 40 degrees c and ph of 8
b) temperature of 27 degrees c and ph of 4
c) temperature of 37 degrees c and ph of 6
d) temperature of 50 degrees c and ph of 10

Explanation:

1. Enzymes have a specific shape for substrate - binding and catalysis. A change in shape (denaturation) disrupts the active - site structure, preventing the enzyme from binding to the substrate and catalyzing the reaction.
2. The peak of the temperature - reaction rate graph indicates the optimal temperature, and the peak of the pH - reaction rate graph indicates the optimal pH. By observing the graphs, the highest reaction rate occurs at around 37 degrees C for temperature and pH of 6.

Answer:

1. d) the enzyme will no longer be able to catalyze the reaction with the substrate
2. c) temperature of 37 degrees C and pH of 6