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| 1. Measures CLGs 3.1.2, 3.2.2 |
Which of these factors would cause a decrease in the enzyme activity of bacteria that live in hot springs where the temperature is 95°C and the normal pH is between 2 and 4?
- introducing the enzyme sucrase into the hot spring
- placing the bacteria into an environment of pH 3
- moving the bacteria to a temperature of 37°C
- agitating the water in the hot springs
Correct Response: C
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| 2. Measures CLGs 1.7.1, 3.1.1 |
Many people lack the enzyme that allows them to digest lactose, a sugar that is found in dairy products. These people are referred to as “lactose-intolerant.” The enzyme that will allow them to digest lactose is
- amylase
- galactase
- lactase
- protease
Correct Response: C
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| 1. Measures CLGs 1.2.5, 1.5.1, 3.1.2, 3.2.2 |
A change in temperature from 37°C to 45°C would affect the activity of catalase, a common enzyme found in liver.
- Describe how the structure of the enzyme would be affected
- Describe how the function of the enzyme would be affected
| Answer Cues: | Students should discuss the idea that if this increase in temperature were to occur, the enzyme would be denatured thus rendering it inactive. The 3-D structure of the enzyme would be changed. Students may also say that the shape of the active site would be changed. They may also relate this to the lock and key activity completed in the Engagement section where the shape of the key determines its fit into the lock.
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| 2. Measures CLGs 1.4.8, 1.5.1, 3.1.1 |
