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:

Cochlea

A spiral-shaped, fluid-filled inner ear structure that is essential for converting sound waves into electrical signals that can be interpreted by the brain as sound.

Waves

are disturbances or variations that travel through a medium, such as air, water, or vacuum, transferring energy from one point to another without permanent displacement of the particles of the medium.

Auditory Receptors

Specialized cells located in the inner ear that convert sound waves into electrical signals, which are interpreted by the brain as sound.

Cochlea

A spiral-shaped cavity of the inner ear that is primarily responsible for converting sound vibrations into nerve impulses.