Unformatted text preview: 40. Which of the following statements concerning DNA replication is TRUE? lagging strand. DNA replication requires a single Polymerase in prokaryotes.
An origin of replication is only required for DNA synthesis on the leading strand. Okazaki fragments are found on the leading and lagging strands.
More origins of replication (ori sequences) are needed for DNA synthesis on the lagging strand deoxyribonuclease. Q51) RNA synthesis is required for DNA replication on both the leading strand and
E 41. Uracil in DNA : is enzymatically converted to thymine by methylation
is removed ‘by a deoxyribonuclease
is removed by a ribonuclease ® may be replaced with cytosine as a result of DNA repairt
E None of the above. 42. Which of the following occurs in the 3' to 5' direction? _ \
. A. The removal of RNA from Okazaki fragments. 6“ ’73
. The reaction catalyzed by photolyase. B.
(9) The editing function of DNA polymerase 1.3‘ 1._:) 6 D The polymerization reaction catalyzed by reverse transcriptase.
E The translation of mRNA. 61 ,9sz 43. Which of the following statements concerning translation (protein synthesis) is FALSE?
ATﬁP is required for initiation complex formation on both prokaryotic and
eukaryotic ribosomes. 0M @WO’K C Elongation factors facilitate the binding of aa-tRNA to ribosomes. AUG is an initiation codon in both prokaryotes and eukaryotes. The large and small ribosomal subunits dissociate after translation termination.
All ribosomes consist of two subunits. $1190.01 ®
J 44. Which of the following statements is FALSE? A. Translation of procaryotic mRNA usually begins before RNA polymerase has ﬁnished transcribing the gene.
GC-rich DNA is more resistant to heat denaturation than AT-rich DNA. All nucleic acid bases are covalently attached to the 1' position of the ribose
Most eukaryotic mRNA molecules undergo splicing reactions before they are com ['11 - translated.
3 When complementary regions of DNA or RNA form double strands, purines
' usually pair with purines and pyrimidines usually pair with pyrimidines. C 45. Which of the following serves as the primary enzyme in DNA replication in prokaryotic
organisms such as E. coli? (A) DNA polymerase I; (B) DNA polymerase II; C) DNA polymerase III
(D) RNA polymerase; (E) none of the above ...
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- Spring '08