Eukaryotic RNA polymerase II is used to synthesize: a. rRNA O b. tRNA O C. O d. RNA from viral DNA O e. mRNA double helical viral DNA from viral RNA
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- DNA molecular with complementary sticky ends associate by (a) covalent bonds (b) hydrogen bonds (c) ionic bonds (d) disulfide bonds (e) phosphodiester linkagesPortions of eukaryotic mRNA sequence that are removed during RNA processing are . a. exons b. caps c. poly-A tails d. intronsThe beta subunits of E.coli DNA polymerase III are responsible for its _______. A. ribosome assembly B. 5’→ 3’ polymerase C. 3’ → 5’ exonuclease and proof-reading D. sliding clamp
- What kinds of nonstructural genes are never translated? Group of answer choices a bmessenger RNA genes b transfer RNA and ribosomal RNA genes c ribosomal RNA genes d transfer RNA genes e ribosomal RNA genes and messenger RNA genesBacteria are able to successfully transcribe and translate humangenes becausea. both bacteria and humans contain plasmid vectors.b. bacteria can replicate their DNA, but humans cannot.c. human and bacterial ribosomes are vastly different.d. the genetic code is nearly universal.The polymerase chain reaction requires the following except A. primers complementary to the ends of the sequence to be amplified B. carefully controlled temperature conditions C. cycles of denaturation, annealing, and extension D. RNA polymerase to synthesize RNA primers
- In bacterial RNA polymerase, the sigma factor A. contains the catalytic activity of the polymerase B. remains part of the polymerase throughout transciption. C. recognizes promoter sites in the DNA D. recognizes transcription termination sites in the DNA E. is a subunit of DNA polymerase IIIThe sigma subunit of bacterial RNA polymerase _____. a. binds to a bacterial gene’s promoter b. is composed of both polypeptide and RNA molecules c. is required for termination of transcription d. is required for RNA polymerization e. is required for ribosomal bindingIn catalyzing the methylation or pseudouridylation of an rRNA, asnoRNA functions asa. a decoy.b. a scaffold.c. a guide.d. both b and c.
- Following a CRISPR mediated DNA double-strand break, how can the DNA be repaired by the cell? Choose all that apply. A. Base pairing between complementary sticky sides. B. Nonhomologous end joining. C. Homology directed repair. D. Crossing over between nonhomologous chromosomes.Which of the following are involved in transcription?Select all that apply a. rRNA b. DNA c. acetyl transferase d. tRNA e. ribosome f.a mino acids g. RNA polymerase h. mRNAa) 5 nuclear RNA polymerases b) 3 nuclear RNA polymerases . c) 6 nuclear RNA polymerases d) none of these is true Eukaryotic cells contain ___________________ that transcribe distinct classes of genes.
