A)They are only found upstream of the transcription start site.
B)They are never found more than one kilobase away of the transcription start site.
C)They are only found in introns.
D)They generally range in length from about 50-200 base pairs.

A)serves as a promoter sequence for genes transcribed by RNA polymerase III.
B)is located approximately 100 base pairs upstream of the start site for mRNAs.
C)is present in all eukaryotic genes.
D)acts to position RNA polymerase II for transcription initiation.