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
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.
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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- Spring '08