BIOLOGY
ENZYMES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Optimum temperature is the temperature at which enzymes are inactive
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Different enzymes have different optimum temperatures
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As temperature increases, the rate of reaction increases
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Beyond optimum temperature, the structure of enzyme changes
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Detailed explanation-1: -Temperature: Raising temperature generally speeds up a reaction, and lowering temperature slows down a reaction. However, extreme high temperatures can cause an enzyme to lose its shape (denature) and stop working. pH: Each enzyme has an optimum pH range.
Detailed explanation-2: -This optimal temperature is usually around human body temperature (37.5 oC) for the enzymes in human cells. Above this temperature the enzyme structure begins to break down (denature) since at higher temperatures intra-and intermolecular bonds are broken as the enzyme molecules gain even more kinetic energy.
Detailed explanation-3: -As temperature increases, the rate of enzyme-controlled reactions increases until the optimum temperature is reached, beyond which the enzymes denature and the rate of reaction decreases. At a pH above or below their optimum pH, enzymes denature causing a decrease in the rate of reaction.
Detailed explanation-4: -As the temperature rises, so does the level of enzyme activity. Maximum activity is achieved at the enzyme’s optimum temperature. The active site of the enzyme changes shape as the temperature rises above optimum temperature, resulting in a decline in activity.