Enzymes Flashcards

1
Q

Why does the rate of an enzyme controlled reaction increase from 0 to 40 degrees C

A

As the temperature increases the enzyme and substrate gain kinetic energy therefore more frequent collisions between the substrate and the enzymes active site

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2
Q

Why does the rate of an enzyme controlled reaction decrease above its optimum temperature?

A

The enzyme denatures which means the active site changes shape therefore the substrate no longer fits into the active site.

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3
Q

Why does the rate of an enzyme controlled reaction decrease if the pH of a solution is different from the enzymes optimum pH?

A

The enzyme denatures which means the active site changes shape therefore the substrate no longer fits into the active site.

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4
Q

What is the lock and key theory?

A

The substrate and active site fit together because they have a complementary shape to each other. One specific substrate will fit the active site.

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5
Q

What is an enzyme?

A

A protein that acts as a biological catalyst speeding up reactions. It has a specific shape with an active site that only fits one substrate to act on.

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