Question

Which of the following bacterial DNA polymerases possess 5′ to 3′ polymerase activity?

-DNA pol I
-DNA pol II
-DNA pol III
-Two of the above
-All of the above

Answer 1

In bacterial DNA replication, DNA pol I, DNA pol II, and DNA pol III all have 5' to 3' polymerase activity, with DNA pol III being the primary enzyme for synthesis, while DNA pol I and II are primarily involved in repair.

Step-by-step explanation:

All bacterial DNA polymerases have the 5′ to 3′ polymerase activity. This includes DNA pol I, DNA pol II, and DNA pol III. These enzymes are critical in the process of DNA replication, where DNA pol III executes the bulk of the synthesis, and DNA pol I and DNA pol II play important roles in repair processes.

Each of these polymerases synthesizes new DNA strands by adding nucleotide bases in a 5′ to 3′ direction, using the energy created when the bond between phosphates in the nucleotides is broken. Additionally, DNA pol I is unique in that it also has 5′ to 3′ exonuclease activity, which is important for removing RNA primers during replication.