There Is an Early-Onset Form of Alzheimer's in Which the Symptoms

question 295

Multiple Choice

There is an early-onset form of Alzheimer's in which the symptoms occur before age 65. This form of Alzheimer's has a very strong genetic basis. What percentage of Alzheimer's patients has early-onset Alzheimer's?

• A) 5%
• B) 20%
• C) 35%
• D) 50%

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Definitions:

Protein Structure

The specific three-dimensional arrangement of amino acids in a protein, determining its function and activity, includes primary, secondary, tertiary, and quaternary structures.

Exons

Segments of a DNA or RNA molecule containing information coding for a protein or peptide sequence.

Introns

Noncoding sections of an RNA transcript, or the DNA encoding it, that are removed before the RNA molecule is translated into a protein.

Promoter

In an operon, a sequence of DNA where RNA polymerase binds prior to transcription.