Question

rennin is an enzyme that catalyzes a reaction that solidifies milk. rennin was added to three different test tubes with milk. each test tube was placed in a water bath for ten minutes. the data collected during the experiment are shown.

test tube	variable	result
2	room - temperature water bath	semi - solid milk
3	hot water bath	no solids, only liquid milk

which statement best explains the result of test tube 3?
a the enzyme changed the product.
b the substrate was used up.
c the enzyme was denatured.
d the substrate reacted with the enzyme.

Explanation:

Enzymes have an optimal temperature range for activity. High - temperature (hot water bath) can cause enzymes like rennin to denature, losing their structure and function. When rennin is denatured in test tube 3, it cannot catalyze the reaction to solidify milk, resulting in only liquid milk.

Answer:

C. The enzyme was denatured.