Question

Many of the biochemical reactions that occur within your cells are catalyzed by enzymes. Which of the following statements is true about most enzyme-assisted reactions?

a. They can take place only within a ribosome.
b. They occur more quickly than reactions without enzymes.
c. Enzymes are quickly used up during the reactions.
d. They can take place at any temperature or pH

Answer 1

a. They can take place only within a ribosome. FALSE
b. They occur more quickly than reactions without enzymes. TRUE
c. Enzymes are quickly used up during the reactions. FALSE
d. They can take place at any temperature or pH.FALSE

Answer 2

The correct answer is:

b.They occur more quickly than reactions without enzyme

Step-by-step explanation:

Catalysts decrease the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes further up reactions by reducing activation energy. Many enzymes change shape when substrates bind.