A Cell Is Unable to Progress into the S Phase

question 45

Multiple Choice

A cell is unable to progress into the S phase of the cell cycle. Further studies indicate that the RB-E2F complex is unable to dissociate in this cell and thus remains together. Which of the following genes is MOST likely mutated?

• A) a gene that encodes a cyclin-dependent kinase
• B) a gene that encodes an acetylase
• C) a gene that encodes an enzyme that removes phosphate groups from RB
• D) a gene that encodes an enzyme that phosphorylates E2F
• E) a gene that encodes the Ras protein

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Definitions:

Sensory Overload

A condition where one or more of the body's senses experiences over-stimulation from the environment, leading to feelings of discomfort or inability to focus.

Attention Economy

An economic model where human attention is treated as a scarce commodity, and businesses compete to capture and hold consumer attention.

Sleep Deficits

Sleep deficits occur when an individual consistently gets less sleep than needed, leading to various negative health outcomes, including impaired cognitive function and increased stress.

Active Filtering

The selective process of consciously identifying and paying attention to information that is deemed relevant, while ignoring the rest.