Question

most enzyme - assisted reactions are
a. reversible
b. able to take place at any temperature
c. exothermic
d. endothermic

level 4
q4
enzymes are not consumed in chemical reactions. what does this mean?
a. enzymes are not used up in a reaction
b. enzymes are not denatured
c. enzymes can continue to be used in many reactions
d. all of the above

Explanation:

1. For the first question: Enzymes - assisted reactions are often reversible. Enzymes lower activation energy in both forward and reverse directions. They don't work at any temperature (denature at high - temps), and reactions can be exothermic or endothermic.
2. For the second question: When enzymes are not consumed in chemical reactions, it means they are not denatured, not used up in a single reaction, and can be reused in multiple reactions.

Answer:

1. A. Reversible
2. D. All of the above