A Prokaryotic Replisome Typically Contains Three Molecules of DNA Pol

question 43

Multiple Choice

A prokaryotic replisome typically contains three molecules of DNA pol III, but only one molecule of DNA pol I. Why?

• A) The DNA pol I works on the leading strand, while DNA pol IIIs work on the Okazaki fragments. since there are several of those, it takes more proteins to keep up.
• B) DNA pol I has a built-in proofreading exonuclease; DNA pol III does not. The second DNA pol III is needed to follow the first to accomplish the necessary proofreading.
• C) The DNA pol IIIs do most of the work. DNA pol I only has to work on the telomers.
• D) DNA pol I replaces the RNA primers with DNA, which really only needs to be done repetitively on one strand, while both strands are worked on by the DNA pol IIIs.

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Definitions:

Binary Search

An efficient algorithm for finding an item from a sorted list of items, by repeatedly dividing in half the portion of the list that could contain the item.

Sorted List

A list that maintains its elements in a sorted order, either ascending or descending, making it efficient for operations like searching.

Maximum Comparisons

The term usually refers to the highest number of comparisons required to complete an operation, often used in the context of sorting and searching algorithms.

Binary Search

A searching algorithm that finds the position of a target value within a sorted array by repeatedly dividing in half the portion of the list that could contain the target value.