A Researcher Found a Method She Could Use to Manipulate

question 20

Multiple Choice

A researcher found a method she could use to manipulate and quantify phosphorylation and methylation in embryonic cells in culture.
-She tried decreasing the amount of methylation enzymes in the embryonic stem cells and then allowed the cells to further differentiate. Which of the following results would she most likely see?

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

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Definitions:

Broca's Area

A region in the frontal lobe of the dominant hemisphere, usually the left, of the brain with functions linked to speech production.

Hypothalamus

A region of the brain that coordinates the autonomic nervous system and the activity of the pituitary, controlling body temperature, thirst, hunger, and other homeostatic systems.

Thalamus

A part of the brain located in the center of the cerebral hemisphere, which acts as a relay station for sensory information.

Epithalamus

A posterior segment of the diencephalon of the brain, involved in the regulation of sleep-wake cycles and the secretion of melatonin from the pineal gland.