A Researcher Found a Method She Could Use to Manipulate

question 57

Multiple Choice

A researcher found a method she could use to manipulate and quantify phosphorylation and methylation in embryonic cells in culture. One of her colleagues suggested she try increased methylation of cytosine (C) nucleotides in the DNA of promoters of a mammalian system. Which of the following results would she most likely see?

• A) decreased chromatin condensation
• B) activation of histone tails for enzymatic function
• C) higher levels of transcription of certain genes
• D) inactivation of the selected genes

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Definitions:

Down Syndrome

A genetic disorder caused by the presence of an extra chromosome 21, characterized by physical and intellectual developmental delays.

Hypotonic Musculature

Refers to muscles that have less than normal tone or strength, often seen in various neurological or muscular disorders.

Physical Characteristics

The tangible attributes or features of an object or organism, including size, shape, color, and structure.

Down Syndrome

A genetic disorder caused by the presence of an extra 21st chromosome, leading to developmental and physical changes.