Which of the following statements are true only for eukaryotic transcription and processing of mRNA but not for prokaryotic? (1) transcription is regulated by the binding of proteins to specific DNA sequences upstream of the gene.
(2) The RNA is terminated at the 5' end with a cap, consisting of 7-methylguanosine connected by a triphosphate bridge.
(3) RNA polymerase locally melts the DNA strand and copies only the template strand.
(4) Non_coding regions of the RNA transcript are spliced out.
(5) The 3'_terminus of the RNA consists of a long string of A residues (poly A) which are added posttranscriptionally.
A) only 2, 3 and 4 are true
B) only 3,4 and 5 are true
C) only 1, 2 and 3 are true
D) only 2, 4 and 5 are true
E) only 1, 4 and 5 are true

Question

Quizplus · Accepted Answer

(2) The RNA cap is present only in eukaryotes, and not in prokaryotes.
(4) Splicing of non-coding regions is also a unique feature of eukaryotic transcription.
(5) The addition of a poly-A tail is a post-transcriptional modification unique to eukaryotes.
(3) While RNA polymerase copies only the template strand in both prokaryotes and eukaryotes, the local melting of the DNA strand is a more complex process in eukaryotes due to the involvement of numerous transcription factors.
(1) While protein binding to DNA sequences may regulate transcription in both prokaryotes and eukaryotes, this is not a unique feature of eukaryotes.

Which of the Following Statements Are True Only for Eukaryotic