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
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.
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- Spring '08