A Researcher Found a Method She Could Use to Manipulate

question 46

Multiple Choice

A researcher found a method she could use to manipulate and quantify phosphorylation and methylation in embryonic cells in culture. In one set of experiments she succeeded in decreasing methylation of histone tails. Which of the following results would she most likely see?

• A)increased chromatin condensation
• B)decreased chromatin concentration
• C)abnormalities of mouse embryos
• D)decreased binding of transcription factors
• E)inactivation of the selected genes

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Definitions:

Local Potential

Small changes in membrane potential that are crucial in the propagation of nerve impulses and can lead to an action potential if they reach a certain threshold.

Depolarization Event

A temporary change in a cell's membrane potential, making it more positive, typically associated with the initiation of nerve impulses or muscle contractions.

Stimulus Strength

The intensity of a stimulus, which can influence the magnitude of response in sensory and other physiological systems.

Resting Membrane Potential

The electrical potential difference across the plasma membrane when a cell is in an unstimulated condition.