Two modular elements that appear as consensus sequences upstream from RNA polymerase II transcription start sites are ________.
A) microsatellites and transposons
B) rDNA and nucleolar organizers
C) TATA and CAAT
D) TTAA and CCTT
E) enhancers and telomeres

Question

Quizplus · Accepted Answer

The TATA and CAAT boxes are modular elements that are commonly found upstream from RNA polymerase II transcription start sites. These elements serve as binding sites for transcription factors and help initiate transcription. The other choices are not consensus sequences commonly found upstream from transcription start sites.

Two Modular Elements That Appear as Consensus Sequences Upstream from RNA