A transcription factor is a. a subunit of RNA polymerase II that does not have a

Question

A transcription factor is a. a subunit of RNA polymerase II that does not have a prokaryotic analogue. b. the part of the promoter sequence closest to the start of transcription. c. a protein other than RNA polymerase that is involved in transcription. d. a sequence that determines whether an upstream element will be an enhancer or silencer. The major difference between RNA initiation in eukaryotes and prokaryotes is the number of factors involved in the process. a. True b. False Where is the TATA box located? a. At the transcription start site (+l). b. -10 region. c. -25 region. d. -40 region. Which of the following is not a key step in the activation of mRNA synthesis in eukaryotes? a. Binding of TBP to the DNA. b. Binding of other transcription factors. c. Binding of RNA Pol l. d. Phosphorylation of the RNA Pol. e. All of these are necessary to initiate RNA synthesis in eukaryotes. Which of the following RNAs is noted for having a "cloverleaf" structure? a. mRNA b. rRNA c. tRNA d. All of these A commonly encountered feature of transfer RNA synthesis is a. the precursor of several tRNA molecules is transcribed in one long polynucleotide sequence b. there is little or no base modification after transcription c. modification of the sugar moiety never takes place d. the covalent binding of tRNA to specific proteins

Explanation / Answer

1c a protein other than RNA polymerase which is involved in transcription

3)c - 25 region

5)c tRNA

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