A Mutation in the IGF2 Gene in Pigs Results in a Three-Fold

question 28

Multiple Choice

A mutation in the IGF2 gene in pigs results in a three-fold increase in the transcriptional activity of this gene in muscle cells; therefore, these pigs are leaner and more muscular. Because this mutation is located in the noncoding region of the IGF2 gene, we can infer that:

• A) the IGF2 gene is a prokaryotic gene.
• B) the IGF2 gene is present only in muscle cells, but not in adipose (fat) cells.
• C) the mutation changes the amino acid sequence of the IGF2 protein.
• D) the mutation alters the regulatory region of the IGF2 gene.
• E) less IGF2 protein is synthesized in the muscle cells of these pigs.

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