img072 - 2 6 The smthesis of PRPP(phospho-ribosyl...

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Unformatted text preview: 2 6. The smthesis of PRPP (phospho-ribosyl pyrophosphatem; )4 SynaiatedbyADP . i .+ $ lnhibii'td b3 (TD F/A DP 3‘ /a./ Sg'muififed byGDP. "lh‘b‘ ‘ \ C. Stimulated byCDP oc+ even ‘0 pa; hogs Inhibited byGTP no ‘5’?“ when toe/glam the is \ "Ch? 5 / None of the above ‘ ' \owec 94-!» hot 27. Which of the following statements co ceming DNA replication is TRUE? RNA syntheiis isI required for DNA replication on both the leading strand and lagging ' ,— strand. v )1.” 1 DNA replication requires a single polymerase in prokaryotes. W / An origin of replication is only required for DNA synthesis on the leading strand. W 137 Olmzaki fragments are found on thgjead-ing and lagging str . Ch“; / 11/ More origins of replication (ori sequences) are needed for DNA synthesis on the lagging ,/ strand 0096 28 - Uracil in DNA: may be replaced with cytosine as a result of DNA repair . is enzymatically converted to thymine by methylation /Q./ is removed by a deoxyribonuclease /B.’ is removed by a ribonuclease /L-/ None of the above. 29. Which of the following occurs in the 3' to 5' direction? I ”a W X The removal of RNA from Okazaki fragments. 6 \ a B exchuc \ encc . The reaction catalyzed by photolyase. The editing function of DNA polymerase I. 3‘ .9 S ‘ ‘ . The polymerization reaction catalyzed by reverse transcriptase. t *9 Q) /E.’ The translation of mRNA. 63 ‘ a ‘5 ‘ -« _ termination. ’/.Bf/ All ribosomes consist of two subunits. w 31. Which of the following statements is FALSE? V. )/ 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. “W0C fi.’ All nucleic acid bases are covalently attached to the 1' position of the n'bose TV ‘\ C 5 Most eukaryotic mRNA molecules undergo splicing reactions before they are translated. 1T “<3. with purines. and pyrimidines usually pair with pyrimidines. \___-m_,,m ...
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