Question

the graph represents the rate of reaction exhibited by the enzyme trypsin at different temperatures.
trypsin denatures the protein casein in milk, causing casein to coagulate and the milk to thicken and clump. a student places four test tubes (w, x, y, and z) containing 5 ml of milk mixed with two drops of the enzyme trypsin in water baths maintained at four different temperatures as shown in the table.
in which test tube will the milk take the least amount of time to thicken and clump?

Explanation:

Step1: Analyze the graph

The graph shows the rate of reaction of trypsin at different temperatures. The rate is highest around a certain optimal temperature (likely around 40 - 50°C from the graph's peak).

Step2: Check test tube temperatures

• Test tube W: 20°C (low temperature, slow reaction rate)
• Test tube X: 40°C
• Test tube Y: 50°C (closer to the optimal temperature from the graph's peak)
• Test tube Z: 70°C (high temperature, enzyme may denature, slow rate)

Step3: Determine the fastest reaction

A faster reaction rate means the milk will thicken and clump in the least time. Since Y (50°C) is near the optimal temperature where the reaction rate is highest (from the graph), the milk in test tube Y will take the least time.

Answer:

Y