so which of the folloaing proteins is responable for reduding prokaryotic chroma

Question

so which of the folloaing proteins is responable for reduding prokaryotic chromatin? A) Helicase B) Primase C) Single strand binding protoins D) Topoisomerase IVONA avrase reducing+supercoling (andlor introducing-superoiling) in E) Ligase 31. If a DNA polymerase ase is roplioating DNA in prokaryotes and inserts an inoorredt base, what function will the replicating polymerase perform to remove A) 5' to 3' exonuclease activity B) 3 to 5' exonucloase activity C) 5' to 3' polymerase activity D) 3 to 5 polymerase actvity E) endonuclease activity the incorrect base? 32. A promoter A) is the binding site for RNA polymerase. B) is transoribed into mRNA C) lies within a structural gone D) is found on mRNA and is used to orient ribosomal subunits during intation ot translation. E) is part of the DNA polymerase odon and 33. In studies of eukaryotic genes, molecular biologists have found that the distance between the start o start codon and stop codon termination codon of cDNA probes is considerably shorter than the distance between te in the actual gene isolated from the gonomic DNA (the DNA trom the nuclous). Which of the following statements explains these observations? A) Mature eukaryotic mRINA has no 5 methylated guanosine cap. B) Mature eukaryotic mRNA has no 3 poly-A tail. C) Mature eukaryotic mRNA has no introns D) Mature eukaryotic mRNA has no 5' leader sequence E) The genomic DNA encodes for a 3 poly-A tail 34. Which of the following islare found in both prokaryotic AND eukaryotic A) Telomeres. B) Centromeres. C) A, B and D D) Origin of replication E) A and B 35. Which of the following are critical elements of a prokaryotic promoter? A) 35 box B) -10 box C) A and B D) Rho binding site E) B and D A) The ribosome translocates along the mRNA in a single base step. 8) The second tRNA binds to the Acceptor site. C) The empty tRNA exits the ribosome from the Acceptor site. D) Peptide chain extension occurs at the Exit site. E) A peptide bond forms between the amino group of the first amino acid and the carboxy group of the second. 36. After initiation of translation, which of the following is true? Page 5 of B

Explanation / Answer

Ans 30 : ( D ) Topoisomerase II / DNA gyrase

Ans 31 : (B ) 3' -5' exonuclease activity

Ans 32: ( A ) is a binding site for RNA polymerase

Ans 33: ( C ) mature eukaryotic mRNA has no introns.

Ans 34 : ( D ) origin of replication

Ans 35: ( C ) A and B

Ans 36 : ( E ) a peptide bond forms between the amino acid of the first amino acid and the carboxy group of the second.

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