The Function of the Eukaryotic DNA Replication Factor PCNA (Proliferating $\beta$

question 83

Multiple Choice

The function of the eukaryotic DNA replication factor PCNA (proliferating cell nuclear antigen) is similar to that of the $\beta$ subunit of bacterial DNA polymerase III in that it:

• A) facilitates replication of telomeres.
• B) forms a circular sliding clamp to increase the processivity of replication.
• C) has a 3ʹ\(\rightarrow\) 5ʹ proofreading activity.
• D) increases the speed but not the processivity of the replication complex.
• E) participates in DNA repair.

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Definitions:

Plate Boundaries

Plate boundaries are the edges where two or more tectonic plates meet, which are characterized by seismic activity and are locations where earthquakes, volcanic eruptions, and mountain-building occur.

Plate Boundaries

The edges where two tectonic plates meet, which can be sites of significant geological activity including earthquakes, volcanoes, and mountain building.

Subduction Zone

A geological region where one tectonic plate moves under another, leading to various geological phenomena, including earthquakes and volcanoes.

Destructive Earthquakes

Earthquakes that result in significant damage and loss of life, often occurring near tectonic plate boundaries where energy release is concentrated.