A sequence of bases located upstream from a reference point occurs toward the:
A) 3′ end of the amino acid sequence
B) 5′ end of the mRNA sequence
C) 3′ end of the mRNA sequence
D) 5′ end of the transcribed DNA strand
E) carboxyl end of the amino acid sequence

Question

Quizplus · Accepted Answer

In molecular biology, "upstream" refers to the direction toward the 5′ end of the mRNA sequence or the DNA strand being transcribed.

A Sequence of Bases Located Upstream from a Reference Point