IB Biology HL D1.2.13 Hl Initiation of Transcription At Promoter Questions
In IB Biology HL D1.2.13, promoters mark where transcription starts and the direction of the gene. In eukaryotes, transcription factors help RNA polymerase bind and begin transcription.
Syllabus
First assessment 2025
Course
Biology HL
Level
HL
Exam points
Identify a promoter as a non-transcribed region upstream of a gene where transcription starts.
Explain or identify the promoter as the RNA-polymerase binding site for transcription initiation.
IB Biology HL D1.2.13 Hl Initiation of Transcription At Promoter Questions question 1
[Maximum number: 2]
The diagram shows the tandem repeats on two different chromosomes for a couple and their children. The number of tandem repeats of the sequence AGAT is shown on chromosome 5 (Chr 5) and the sequence of AGAA on chromosome 18 (Chr 18). One child is adopted.
Explain the function of a promoter in DNA.
a
is a non-coding/non-transcribed section of DNA/bases;
b
transcription starts/is initiated at the promoter;
c
region for binding (to DNA) of RNA polymerase OR region for RNA polymerase to separate the DNA strands;