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.

---

Definitions:

Operating Profit

Income generated from the principal activities of a company, not including interest and tax deductions.

Retail Price

The price at which goods or services are sold to the public.

Trade Discount

A reduction in the list price of goods or services offered to buyers, typically in the business-to-business market.

Wholesalers

Businesses or individuals that sell goods in large quantities at lower prices, typically to retailers or professional buyers.