1- a( is a segment of a gene that does not code for a product

2- a( is a dna sequence that begins with a start codon and ends with a stop ( nonsense) codon.

3- a( is a dna segment that is transcribed and processed to produce a specific protein or rna product.

4- a( is a gene segment that appears in mature mrna.

5- a( is a small cdna sequence, synthesized from mrna and sequenced, that can be used to identify a particular gene.

6-a( contains genes for related proteins and regions that function in gene transcription

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gene expressed sequence tag nitron operon open reading frame exon