1) What must eukaryotes do to initiate transcription of a gene? e) Bind transcri
ID: 140202 • Letter: 1
Question
1) What must eukaryotes do to initiate transcription of a gene?
e) Bind transcription factors from enhancer sequences to the RNA Polymerase.
What are two distinguishing features of RNA?
a) Bind RNA Polymerase to displace histone proteins that binding DNA in the promoter region. b)Recruit general transcription factors to produce an open complex and then recruit RNA Polymerase. c)Recruit the transcription factors and RNA Polymerase that compose the pre-initiation complex. d)Open the DNA template and then bind RNA Polymerase at the transcriptional initiation site.e) Bind transcription factors from enhancer sequences to the RNA Polymerase.
What are two distinguishing features of RNA?
a)RNA forms a double helix of reverse complementary strands. b)RNA contains phophodiester bonds as part of its sugar backbone. c)RNA contains a methylated form of thymine. d)RNA has a ribose sugar and uracil nitrogenous base. e)RNA contains a pyrophosphate group bound to the ribose.Explanation / Answer
1) Answer is c) Recruit the transcription factors and RNA polymerase that compose the pre-initiation complex.
Eukaryotic transcription occurs in the nucleus of the cell and proceeds in three sequential stages: initiation, elongation, and termination. In the initiation step, an RNA polymerase along with transcription factors, binds to the promoter region of the DNA to form a complex is called pre-initiation complex.
2). Answer is d) RNA has a ribose sugar and uracil nitrogenous base.
and e) RNA contains a pyrophosphate group bound to the ribose.
Because, RNA and DNA, both contain phosphodiester bonds as part of its sugar backbone. DNA contains thiamine which is methylated form of uracil, therefore option (c) is wrong. RNA has ribose sugar while DNA has deoxyribose sugar. RNA contains uracil in place of thiamine. And RNA contains a pyrophosphate group bound to the ribose sugar and DNA contain a pyrophosphate group bound to the deoxyribose sugar.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.