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img058 - 30 Which of the following statements concerning...

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Unformatted text preview: 30: Which of the following statements concerning translation (protein synthesis) 18 FALSE? (I / """ ’ - LA) ATP 15 required for initiation complex formation on both prokaryotic and eukaryotic' ribosomes. B Elongation factors facilitate the binding of aa-tRNA to ribosomes. C. AUG is an initiation codon in both prokaryotes and eukaryotes. D. The large and small ribosomal subunits dissociate afier translation termination. B All ribosomes consist of two subunits. 31. Which of the following statements is FALSE? A Translation of procaryotic mRNA usually begins before RNA polymerase has finished transcribing the gene. B GC-rich DNA is more resistant to heat denaturation than AT-rich DNA>/ C All nucleic acid bases are covalently attached to the 1' position of the ribose D Most eukaryotic mRNA molecules undergo splicing reactions before they are ,1 translated. 9/ When complementary regions of DNA or RNA form double strands, purines usually pair with purines and pyrimidines usually pair with pyrimidines. ’ 32. Which of the following serves as the primary enzyme in DNA replication in prokaryotic organisms such as E. coli? 3} DNA polymerase I DNA polymerase II DNA polymerase III ' . RNA polymerase E. none of the above 33. 5-Fluorouracil, used to treat actinic keratoses, inhibits which of the following enzymes? Aspartate transcarbamoylase. ffihyim'dylate synthetase. DNA polymerase III D. RNA polymerase II. E. Adenosine deaminase. 34. Which of the following is NOT a difference between transcriptionally active genes and Amy’léjr‘; transcriptionally inactive genes in eukaryotes? Can‘t? LL43 / ‘JK “IV“ 1 . ,4), "Z ’ "\ / out a ( I’J/i (I‘fl\lad 554 [lvqx , gir'i @ Active genes are replicated more frequently than inactive genes / +3413 vb" ' . Chromatin from active genes is more accessible to deoxyribonuclease I ’ (DNase 1) than from inactive genes. — C. RNA polymerase binds more frequently to active genes than to inactive genes. /v§D mRNA from active genes is more abundant than mRNA from inactive genes within a given cell E4 None of the above. ...
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