Question

18 - 19. using graph 2, explain how temperature affects enzyme activity. use the word denature.

Explanation:

Enzymes are proteins. As temperature increases, enzyme activity rises until an optimal temperature (peak of the graph). Beyond this, high temperatures denature (alter the 3 - D structure of) the enzyme. Denatured enzymes lose their shape, so their active sites (where substrates bind) are no longer functional. This causes a sharp decline in enzyme activity as seen in the graph's descending part after the peak.

Answer:

As temperature increases, enzyme activity increases until an optimal temperature. At temperatures above the optimal, the enzyme denatures. Denaturation changes the enzyme's shape (especially the active site). A denatured enzyme cannot bind to its substrate effectively, so enzyme activity decreases rapidly after denaturation occurs.