Mastering Bio 2

Question 1

Where does RNA polymerase begin transcribing a gene into mRNA?Where does RNA polymerase begin transcribing a gene into mRNA?
Transfer RNA acts to translate the message to RNA polymerase.
It looks for the AUG start codon.
The ribosome directs it to the correct portion of the DNA molecule.
It starts after a certain nucleotide sequence called a promoter.
It starts at one end of the chromosome.

Answer 1

It starts after a certain nucleotide sequence called a promoter.
In both eukaryotes and prokaryotes, RNA polymerase binds to the gene’s promoter and begins transcription at a nucleotide known as the start point, although in eukaryotes the binding of RNA polymerase to the promoter requires transcription factors.

Question 2

Transcription in eukaryotes requires which of the following in addition to RNA polymerase?
Transcription in eukaryotes requires which of the following in addition to RNA polymerase?
the protein product of the promoter
ribosomes and tRNA
aminoacyl synthetase
several transcription factors (TFs)
start and stop codons

Answer 2

Several transcription factors (TFs)

Question 3

During RNA processing a(n) _____ is added to the 5’ end of the RNA.
During RNA processing a(n) _____ is added to the 5’ end of the RNA.
3’ untranslated region
a long string of adenine nucleotides
5’ untranslated region
coding segment
modified guanine nucleotide

Answer 3

Modified guanine nucleotide