In many multicellular eukaryotic genes, different polypeptides can be produced

In many multicellular eukaryotic genes, different polypeptides can be produced from the same stretch of DNA duplex due to
A.  genes found within the introns of a larger gene.
B.  alternative splicing of the mRNA transcript.
C.  extensive somatic recombination in individual cells.
D.  multiple open reading frames in the same sequence.
E.  different genes on the two complementary strands.


Which of the following is an example of the “genome phenotype?”
A.  the secondary structure of tRNA
B.  the nucleotide sequence of a gene
C.  the GC content of a genome
D.  the restriction map of a DNA sequence
E.  the three-dimensional conformation of the polypeptide product of a gene


Computer programs can scan DNA sequences and identify potential genes, which may or may not be functional genes. A functional gene must
A.  share an exon with another functional gene.
B.  result in a mutant phenotype if its sequence is mutated.
C.  have an open reading frame.
D.  be expressed in all cell types of the organism.
E.  have a functional ortholog in another species.