Unit 3-Molecular Genetics Lesson 5 10.0 Flashcards
1
Q
What does RNA polymerase do first transcription initiation?
A
RNA polymerase binds to DNA at a region called the promoter.
2
Q
What is a promoter?
A
A specialized sequence on the gene where RNA polymerase binds.
3
Q
What is a key element of the promoter?
A
The TATA box.
4
Q
What is the composition of the TATA box?
A
A section of DNA with a high percentage of thymine and adenine bases.
5
Q
What do prokaryotes have instead of the TATA box?
A
Prokaryotes have a TATAAT sequence.
6
Q
In which direction does RNA polymerase add nucleotides?
A
In the 5’ → 3’ direction.
7
Q
What happens to the DNA when RNA polymerase binds to the promoter?
A
RNA polymerase unwinds the DNA.
