The rate of reaction of a typical human enzyme was compared with the rate of reaction of a typical enzyme taken from bacteria that live in hot springs - VCE - SSCE Biology - Question 25 - 2002 - Paper 1
Question 25
The rate of reaction of a typical human enzyme was compared with the rate of reaction of a typical enzyme taken from bacteria that live in hot springs. The rates of ... show full transcript
Worked Solution & Example Answer:The rate of reaction of a typical human enzyme was compared with the rate of reaction of a typical enzyme taken from bacteria that live in hot springs - VCE - SSCE Biology - Question 25 - 2002 - Paper 1
Step 1
A. typical human enzymes fail to act at temperatures above 50°C.
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Answer
From the graph, it is evident that the rate of reaction for human enzymes declines significantly after reaching temperatures above 50°C, indicating that these enzymes lose functionality at higher temperatures.
Step 2
B. the optimal temperature for enzymes for both organisms is about 37°C.
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Answer
The data suggests that the peak reaction rate for human enzymes occurs around 37°C, while bacteria enzymes show their optimal rate at different temperatures. Hence, this conclusion is not accurate.
Step 3
C. a denatured bacterial enzyme would resume activity if re-incubated at 40°C.
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Answer
According to the graph, bacterial enzymes have a significant activity at 40°C. Therefore, it is reasonable to conclude that a denatured enzyme would regain functionality if returned to this temperature.
Step 4
D. enzymes from bacteria that live in hot springs withstand temperatures up to 100°C.
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The graph indicates that bacterial enzymes maintain activity well into the higher temperature range, likely reflecting their adaptation to hot spring environments. Hence, this statement is supported by the data.
