In Fragile X Syndrome, Only Noncoding Regions Within the Gene

question 2

Multiple Choice

In fragile X syndrome, only noncoding regions within the gene for a protein that directs and maintains brain development are heavily methylated, resulting indecreasedcognitive ability and behavioral problems. What is the most likely mechanism of this abnormal expression?

• A)Increased microRNA molecules reducing the synthesis of the gene product
• B)Failure of the methylated regions to undergo translation
• C)Suppression of the "splicing out" action for introns
• D)Suppression of promoter function

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Definitions:

Multiplier Effect

An economic phenomenon where an increase in spending produces an increase in national income and consumption greater than the initial amount spent.

Aggregate Demand

The aggregate market demand for goods and services in an economic environment, valued at a specific price level within a certain timeframe.

MPC

Marginal Propensity to Consume, which is the proportion of any additional income that a consumer spends on goods and services.

Multiplier

An economic factor that quantifies the additional effects of a change in spending on the total economic activity.