img041 - 40 Â 41 42 43 44 The Shine-Dalgamo sequence Is a...

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Unformatted text preview: 40. » 41. 42. 43. 44. The Shine-Dalgamo sequence: - Is a eukaryotic origin of replication signal. @ Is a site on prokaryofic mRNA that may interact With rRNA in the small C) ribosomal unit. C) Is the name given to the poly(A) tail of prokaryotic mRNA; D) Is the restriction endonuclease site common to most bacterial plasmids. oq E) Is a sequence which reads the same forward and backward. § () aft W W During the process of peptide chain elongation, the growing peptide chitin: B) Is linked to the ribosomal RNA. CV Is not linked atalltoany RNA. g5? Is linked to the 3'~0H of the terminal nucleoside of tRNA. Is linked to peptidyl transferase. A) Is linked to the mRNA. Q Restriction endonucleases: A) Digest DNA duplex molecules flow the 5' 0H ends. (£5 Attack only ssDNA. ( . Have base sequence specificity. . . D) Degrade exogenous double—stranded DNA molecules. E) - Are produced by eukaryotes as a defense against bacteria. Xeroderma pigmentosum is a genetic disease characterized by: A) ‘ Loss of melanin pigment in the skin. . B Hypersensitivity toinfiaredradiation.‘ ' . C A defect in DNA repair. Aldosterone insufliciency. E) A defect in tryptophan metabolism. During nuclear processing of a pre-mRNA in cukaryotes, the nucleotides discarded are: _ ' Excns. ‘ B Intronss Duplicate genes; D) Methylated regions. ((5 E) Poly(A) chains. 157 ...
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