Test: GRE Subject Test: Biology


In a eukaryotic cell, a molecule of pre-mRNA is found to have four exons and three introns. Which of the following are possible combinations of the exons, if the order in which they are written is the order in which they will be translated?

I. Exon 1, Exon 2, Exon 3, Exon 4

II. Exon 1, Exon 3, Exon 4

III. Exon 4, Exon 1, Exon 2, Exon 3

I, II, and III

II only

I and II

I only

1/2 questions


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