Pick the most complete correct answer. In archaea, RNA polymerase ________. Multiple Choice is most similar to RNA polymerase II of eukaryotes is most similar to RNA polymerase II of bacteria uses a promoter with a conserved TATA nucleotide sequence is most similar to RNA polymerase II of bacteria and uses a promoter with a conserved TATA nucleotide sequence
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Which of the following regarding gene expression in Archaea is FALSE? The single RNA polymerase resembles a eukaryotic RNA polymerase. Archaeal promoters resemble bacterial promoters. Archaeal initiator tRNA carries methionine. Multiple transcription factors are required for transcription initiation. Archaea have 70S ribosomes that differ in structure from bacterial ribosomes.
Dominador T.
E. coli RNA polymerase differs from E. coli DNA polymerase in that (LO 8.1.1): a. it reads the template DNA strand in the 3' to 5' direction. b. it does not need a primer sequence to initiate reading. c. it is a multiprotein complex, whereas DNA polymerase is a single enzyme. d. the double-stranded DNA gene does not need to be unwound for reading. The promoter sequence is transcribed first, followed by the DNA of the gene. (LO 8.1.2) a. True b. False The sigma subunit is of the proper size to (LO 8.1.3): a. unwind the double-stranded DNA of the gene. b. bind to and cause the crab-claw-like β and β' subunits to close. c. span between and bind to both the -35 and -10 promoter elements. d. span between the promoter and the open reading frame of the gene. The most common way to terminate transcription is by tying a knot at the end of the mRNA molecule. (LO 8.1.3) a. True. GC-rich inverted repeats form a stable loop at the end. b. False. mRNA is a linear molecule and cannot fold back on itself. Chloroplast RNA polymerases are similar to bacterial RNA polymerases because a. chloroplasts are found only in plants, which have a simpler genetic machinery. b. chloroplasts, like bacteria, are not as large as eukaryotic cells. c. chloroplasts perform only photosynthesis; eukaryotic cells perform all other activities. d. chloroplasts arose in plants endosymbiotically. A major difference between prokaryotic sigma factor and eukaryotic transcription factors is that a. eukaryotic transcription factors bind upstream of the coding region; sigma factor binds downstream of the coding region. b. prokaryotic gene expression can proceed without sigma factor; eukaryotic transcription factors are required for gene expression. c. prokaryotic sigma factor binds directly to the polymerase enzyme; transcription factors bind to the DNA and recruit the polymerase. d. eukaryotic transcription factors are required only to initiate transcription; prokaryotic sigma factors are needed throughout transcription.
Adi S.
Which protein is required for recognition of the promoter sequence in prokaryotes, and which protein performs a similar function in eukaryotes? ORC recognizes the promoter in prokaryotes; TBP recognizes the promoter in eukaryotes. RNA Polymerase recognizes the promoter in both prokaryotes and eukaryotes. TFIIA recognizes the promoter in prokaryotes; TFIID recognizes the promoter in eukaryotes. Sigma factor recognizes the promoter in prokaryotes; TBP recognizes the promoter in eukaryotes. Which general transcription factor in eukaryotes is responsible for phosphorylating and activating RNA polymerase? TFIIB TFIID TFIIE TFIIH
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