A Prokaryotic Replisome Typically Contains Two Molecules of DNA Pol

question 34

Multiple Choice

A prokaryotic replisome typically contains two 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:

Economic Profit

The total revenue minus explicit and implicit costs; it represents additional income over what could be earned in the next best alternative.

Average Total Cost

This refers to the total cost of production divided by the number of units produced, representing the cost per unit.

Marginal Cost Curve

A graph that shows the relationship between the marginal cost of producing an additional unit of a good or service and the quantity produced.

Ceteris Paribus

A Latin phrase meaning "all other things being equal," used in economics to isolate the effect of one variable on another.