Different Modification of the Histone Have Different Effects on Gene

question 17

Multiple Choice

Different modification of the histone have different effects on gene expression.For instance,the ninth amino acid of histone 3 is a lysine H3K9) can be acetylated once or methylated up to three times.Which of the following is true regarding H3K9 modification?

• A)If H3K9 has two methyl groups,then the gene will be activated.
• B)If H3K9 has three methyl groups,then the gene will be repressed.
• C)If H3K9 is acetylated,then the gene will be repressed.
• D)If H3K9 has three methyl groups,it is maximally activated compared to only having one methyl group.
• E)If H3K9 has a single methyl group,then the gene will be repressed.

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Definitions:

Provocative

Causing a strong reaction, often deliberately, by presenting challenging or stimulating ideas, situations, or information.

Hypervigilant

An enhanced state of sensory sensitivity accompanied by an exaggerated intensity of behaviors whose purpose is to detect threats.

Avoidant

Characterized by a tendency to avoid social interactions or situations that might lead to negative judgments, criticism, or rejection.

Medicare Fraud

The act of making false statements or misrepresenting facts to obtain payment from the federal Medicare program unlawfully.