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Home⇒ Medical Science⇒ Biochemistry⇒ Transcription and regulation
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ RNA is synthesized on a DNA template in a process called __________ , which utilizes the enzyme __________ transcription, RNA polymerase [other wrong options] [Discuss in forum] translation, RNA polymerase transcription, DNA polymerase replication, DNA polymerase |
Q22 ⇒ The transcriptional regulatory proteins in eukaryotes which induce transcription usually have at least two distinct domains of protein structure, a DNA binding domain and an activation domain [other wrong options] [Discuss in forum] at least two distinct domains of protein structure and a DNA binding domain at least one distinct domains of protein structure, a DNA binding domain and an activation domain none of these |
Q23 ⇒ Rho-dependent termination of transcription in E. coli both (a) and (b) [other wrong options] [Discuss in forum] requires ATP requires about 50 nucleotides of uncomplexed mRNA removes mRNA and holoenzyme from the DNA |
Q24 ⇒ The RNA polymerases that transcribe bacterial DNA are multisubunit enzymes [other wrong options] [Discuss in forum] only active inside the cell interchangable with DNA polymerases highly glycosylated in their active forms |
Q25 ⇒ Upstream regions which are essential for correct transcription are called promoters [other wrong options] [Discuss in forum] enhancers start codons transcription factors |
Q26 ⇒ Promoters for tRNAs are located downstream from the start codon [other wrong options] [Discuss in forum] upstream from the start codon both (a) and (b) none of these |
Q27 ⇒ The function of the sigma factor of RNA polymerase is to assure that transcription begins at the proper point [other wrong options] [Discuss in forum] assure that transcription ends at the proper point assure that translation begins at the proper point assure that translation ends at the proper point |
Q28 ⇒ In eukaryotes, there are three different RNA polymerases. The RNA polymerase responsible for transcription of mRNA is RNA polymerase II [other wrong options] [Discuss in forum] RNA polymerase I RNA polymerase III none of these |
Q29 ⇒ Multiple copies of 5S genes, located at a chromosomal site distinct from the other rRNA genes are transcribed by rRNA polymerase III and the 5S rRNA [other wrong options] [Discuss in forum] are transcribed by rRNA polymerase II are transcribed by rRNA polymerase I and the 5S rRNA are transcribed by DNA polymerase I |
Q30 ⇒ Most transcripts of protein coding genes are cleaved at the 3' end just after a poly adenylation signal [other wrong options] [Discuss in forum] at the 3' end just before a poly adenylation signal at the 5' end immediately after a poly adenylation signal at the 5' end immediately before a poly adenylation signal |
Q31 ⇒ RNA polymerase holoenzyme initiates transcription which involves recognition of the -10 sequence and -35 sequence [other wrong options] [Discuss in forum] recognition of the -10 sequence only recognition of the -35 sequence only none of the above |
Or |