You Create Cells with a Version of the Origin Recognition

question 42

Multiple Choice

You create cells with a version of the origin recognition complex, ORC, that cannot be phosphorylated by S-Cdk and thus cannot be inactivated.Which of the following statements describes the likely consequence of this change in ORC?

• A)Cells will enter S phase prematurely.
• B)Cells will replicate some regions of the genome more than once in a cell cycle.
• C)ORC will be unable to bind to DNA.
• D)DNA helicases will not be able to open up the double helix at the replication origin.

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Definitions:

Viscous Lava

Lava that has a thick, sticky consistency due to a high silica content, flowing slowly.

Lava Fountain

A spectacular volcanic phenomenon where lava is forcefully ejected into the air from a vent or fissure, forming a fountain-like display.

Fluid Lava

describes lava with low viscosity that flows easily, typically associated with less explosive volcanic eruptions.

Felsic Magmas

Magmas that are rich in lighter elements like silicon and oxygen, usually linked with explosive volcanic eruptions due to their high viscosity and trapped gases.