18.
Which of the following is NOT characteristic of a eukaryotic enhancer element?
A:
Its activity is independent of its orientation (i.e., the sequence can be inverted without effect)
B:
Its activity is dependent on its distance from the start site of transcription
C:
It increases the level of transcription of genes under its control
D:
It may be found as far as 1 to 2 kilobases from the promoter
The answer is:
B