Nucleotide sequences that identify the location of transcription start sites and regulate the level of transcription are called:
A) sigma factors.
B) Pribnow boxes.
C) TATA boxes.
D) promoters.
E) enhancers.

Question

Quizplus · Accepted Answer

Promoters contain nucleotide sequences that identify the location of transcription start sites and regulate the level of transcription. Sigma factors are proteins that bind to promoters to initiate transcription. Pribnow boxes are a specific type of promoter sequence found in bacteria. TATA boxes are a type of promoter sequence found in eukaryotes. Enhancers are regulatory sequences that can be located upstream or downstream of the promoter and can increase or decrease transcription levels.

Nucleotide Sequences That Identify the Location of Transcription Start Sites