43. Those portions of DNA preceding the initiation site toward the 5\' end of th

Question

43. Those portions of DNA preceding the initiation site toward the 5' end of the GENE are sald to be that site. a. to the left of b. upstream from c. to the right of d. downstream from e. midstream from 44. Where is the RNA polymerase II phosphorylated during its activation? a. On the N-terminal end of the largest RNA polymerase II subunit. b. On the central 20 amino acids of the largest RNA polymerase Il subunit c. On the 3' end of the largest RNA polymerase II subunit. d. On the 5' end of the largest RNA polymerase II subunit. e. In the carboxyl-terminal domain of the largest RNA polymerase lII subunit. 45. You have attached a polynucleotide with the sequence TTTTTTTTTTTTTTTTTTT to a chromatography column. If you pass a mixture of cellular RNAs through this column, what type of RNA will be selectively retained by the column? a. rRNAs b. mRNAs c. pre-mRNAs d. tRNAs e. rRNAs 46. A tRNA has an anticodon with the sequence 3'-UAC-5'. What would be the sequence of the complementary codon? For the moment do not consider the wobble hypothesis. a. 3'-UAC-5 b. 3'-AUG-5 c. 5'-AUG-3 d. 5-AUC-3 e. S-ATG-3 47. The exon-junction complex (EJC) binds to exon-exon junctions after the splicing out of an intron. What is thought to remove the EJCs? a. the advancing ribosome b. spliceosomes c. special proteases d. nucleases e. snURPS 48. Promoters and a. bind RNA polymerases, specify which strand of DNA to transcribe b. bind RNA polymerases, specify which strand of DNA to translate c. specify the site at which translation begins, determine the length of new polypeptide d. bind to stop codons, determine the length of new polypeptide e. bind to DNA, specify which strand of DNA to transcribe

Explanation / Answer

43. b. Upstream from

44. e. In the carboxy-terminal domain of the largest RNA polymerase II subunit.

45. a and e rRNAs as they are going to have more proportion of Adenosine.

46. e. 5'-ATG-3' Rember that the complementary codon has to have the opposite direction and that Uracil matches with Adenosie.

47. a. The advancing ribosome.

48. a. bind RNA polymerases, specify which strand of DNA to transcribe.

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