organisms are schematically given hereunder (left to right: host cell infected with Poxviridae fowlpox, host cell infected with canarypox virus, and human cell). Poxviridae Each square box in the pictures stands for a nucleotide residue with one of the canonical nitrogen bases: adenine (A), guanine (G), uracil (U) or cytosine (C). Hydrogen bonds are formed according to the complementary principle between the bases with boxes (Chargaff’s rule) opposite to each other. The only exceptions are: A-C G-U The mRNA triplet (codon) identical for all three sequences is circled. Fragments of mRNA sequences belonging to different organisms are given in the hereunder Table in an arbitrary order. These sequences contain Elements X depicted in the above images. Nucleotide sequence № (5´→3´) 1 …GCUGCUAAUGAAGAAAUGACUAUAAAUAGAUGGGUCAUGCCUGACACGCAAAG… 2 …AGGCACUCAUGACGGCCUGCCUGCAAACCUGCUGGUGGGGCAGACCCGAAAAUCCCAC… 3 …GACGAGAUAAUGAAGAAAUGGUCCUAAACAGAUGGGUCGUUCCUGACACCCCGG… SYMBOLS X.
organisms are schematically given hereunder (left to right: Poxviridae host cell infected with fowlpox, Poxviridae host cell infected with canarypox virus, and human cell). Each square box in the pictures stands for a nucleotide residue with one of the canonical nitrogen bases: adenine (A), guanine (G), uracil (U) or cytosine (C). Hydrogen bonds are formed according to the complementary principle (Chargaff’s rule) between the bases with boxes opposite to each other. The only exceptions are: A-C G-U The mRNA triplet (codon) identical for all three sequences is circled. Fragments of mRNA sequences belonging to different organisms are given in the hereunder Table in an arbitrary order. These sequences contain Elements X depicted in the above images. № Nucleotide sequence (5´→3´) 1 …GCUGCUAAUGAAGAAAUGACUAUAAAUAGAUGGGUCAUGCCUGACACGCAAAG… 2 …AGGCACUCAUGACGGCCUGCCUGCAAACCUGCUGGUGGGGCAGACCCGAAAAUCCCAC… 3 …GACGAGAUAAUGAAGAAAUGGUCCUAAACAGAUGGGUCGUUCCUGACACCCCGG… X. SYMBOLS
Preparatory_problems_IChO_2013.docx