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Metabolism › View

Increasing the temperature increases the rate of an enzyme-catalyzed reaction. Once a critical temperature is reached, the reaction stops. Why does this happen?

A. The concentration of reactants drop

B. The enzymes have all been consumed in the reation

C. The increase in temperature alters the pH

D. The polypeptide chains in the enzyme denature

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Microbiology › View

This organelle allows materials to enter and exit the cell and holds the cell together.

A. cytoplasm

B. cell membrane

C. cell wall

D. vacuole

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