M11007Which statement regarding the biosynthesis of thymine incorporated into DNA is correct?
A) A methyl group is transferred to deoxyuridine monophosphate from methionine.
B) A methyl group is transferred to deoxycytidine monophosphate from 5-methyl tetrahydrofolate (THF) .
C) A one-carbon unit is transferred to deoxyuridine monophosphate from 5,10-methylene THF accompanied by oxidation of the THF.
D) A methyl group is transferred to deoxyuridine monophosphate from 5-methyl THF and the THF is oxidized.
E) The enzyme which forms (d) TMP is the primary target of the anti- cancer drug, Methotrexate.
Correct Answer:
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A) is defective
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Q69: C
A) folic acid.
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C) tetrahydrofolic acid.
D)
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B) the precursor
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