The graph below shows the reaction rates of four different chemical reactions. a reaction that is catalyzed by an enzyme usually absorbs less energy and is faster than normal reactions. which of the reactions was most likely catalyzed by an enzyme? a. reaction a b. reaction b c. reaction d d. reaction c

Option B

Explanation:

The energy represented in the graph is the energy required as activation energy for initiating any chemical reaction. Thus, higher is the peak of energy absorbed, higher is the activation energy and hence lower are the chances of chemical reaction catalyzed by an enzyme. With this understanding, the reaction with lowest peak requires the least energy for initiating the chemical reaction and hence it is facilitated by the presence of an enzyme.  

Hence, option B is correct

B

Explanation:

This sort of replication, since it involves one nucleotide being placed right after another in a series, is called continuous. Whereas the DNA polymerase on the leading strand can simply follow the replication fork, because DNA polymerase must move in the 5' to 3' direction, on the lagging strand the enzyme must move away from the fork.