*At a low temperature, the rate of reaction catalysed by enzymes is ..... 1 ..... *When the temperature rises, the kinetic energy of the substrate molecules and enzymes also increases. This increases the ..... 2 ..... between the substrate molecules and enzyme molecules.*The rate of reaction between enzymes and substrate molecules increases.*With every rise in temperature of 10$^circ$C, the rate of reaction controlled by the enzymes will double until it reaches the optimal temperature.

ENZYMES AND METABOLISM

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

*At a low temperature, the rate of reaction catalysed by enzymes is ____ 1 ____ *When the temperature rises, the kinetic energy of the substrate molecules and enzymes also increases. This increases the ____ 2 ____ between the substrate molecules and enzyme molecules.*The rate of reaction between enzymes and substrate molecules increases.*With every rise in temperature of 10

A	low [1]
B	high[1]
C	frequency of active collision[2]
D	frequency of active adestroyed enzymes [2]

Explanation:

Detailed explanation-1: -At low temperatures, the number of successful collisions between the enzyme and substrate is reduced because their molecular movement decreases. The reaction is slow.

Detailed explanation-2: -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. Changing the pH outside of this range will slow enzyme activity.

Detailed explanation-3: -The rate of an enzyme-catalyzed reaction increases with an increase in the concentration of an enzyme. At low temperatures, an increase in temperature increases the rate of an enzyme-catalyzed reaction. At higher temperatures, the protein is denatured, and the rate of the reaction dramatically decreases.

Detailed explanation-4: -Higher temperature generally causes more collisions among the molecules and therefore increases the rate of a reaction. More collisions increase the likelihood that substrate will collide with the active site of the enzyme, thus increasing the rate of an enzyme-catalyzed reaction.

There is 1 question to complete.

AP BIOLOGY

BIOCHEMISTRY

ENZYMES AND METABOLISM