Draw the complete structure of the trinucleotide deoxyribo-oligonucleotide that is complementary to 5'dTdGdA3'. Draw this completely, showing all atoms of all parts of the structure.
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- Using Figures 8.7 and 8.9 as a guide, draw a dinucleotide composed of C and A. Next to this, draw the complementary dinucleotide in an antiparallel fashion. Connect the dinucleotides with the appropriate hydrogen bonds. FIGURE 8.9 The two polynucleotide chains in DNA run in opposite directions. The left strand runs 5 to 3, and the right strand runs 3 to 5. The base sequences in each strand are complementary. An A in one strand pairs with a T in the other strand, and a C in one strand is paired with a G in the opposite strand. FIGURE 8.7 Nucleotides can be joined together to form chains caled polynucleotides. Polynucleotides are polar molecules with a 5 end (at the phosphate group) and a 3 end (at the sugar group). An RNA polynucleotide is shown at the left, and a DNA polynucleotide is shown at the right.Draw the structure of the deoxyribonucleotide formed by joining two deoxyguanosine 5'-phosphates together.Given the structures of the ribonucleotides as (shown in Image A) and deoxyribonucleotides (as shown in Image B), Draw the structure of the polyribonucleotide UAGCCUG and the structure of thepolydeoxyribonucleotide CGTAGAT.
- Given the structures of the nitrogenous bases shown in the picture, draw the structure of a part of DNA with the sequence: 5'-GTTCA-3'.If a polyribonucleotide contains equal amounts ofrandomly positioned adenine and uracil bases, what proportion of its triplets will encode (a) phenylalanine, (b)isoleucine, (c) leucine, (d) tyrosine?Draw the structure and give the name of a nucleotide made of adenine (A) and deoxyribose.
- draw the structure of the polynucleotide GTTo create a DNA:RNA hybrid from a short stretch of DNA with the sequence 5'-GGCTAAGTATGCCTAGTAGC-3', design the corresponding RNA sequence. Indicate the sequence in a 5' to 3' manner. What type of helix (A, B or Z) will this double-stranded nucleic acid form?Draw the dinucleotide CU. Show structures of the bases
- 5-Bromouridine is known to induce mutations in DNA. One of the characteristics of this compound is that the enol form is favored relative to the keto form. Draw the keto- and the eno- tautomers of the base. Determine (and draw) which base (A, T, G, or C) would most likely interact with each of the two forms by base-pair.In the Watson-Crick DNA base pairing model, Adenine (A) binds to thymine (T), guanine (G) binds to cytosine (C).Draw the structures of thymine and adenine stabilized by Watson-Crick base pair interaction. Also draw the structure of the amide group of glutamine in an interaction of this T-A pair in a way that maximally satisfies the hydrogen bonding capacity of amide.The enzyme thiouridylase converts certain tRNA uridine residues to 2-thiouridine. Draw the structure of this modified nucleotide.