Which of the following are important chemical considerations defining the structure and function of polynucleotides? Conformation of the hexose sugar Conformation of the glyostatic bond Tautomeric conformation of the base b and c a, b, and c
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- Bidentate interactions are those where two or more hydrogen bonds are made with a base or base pair. To achieve this interaction, amino acids must possess more than one hydrogen-bonding atom. Draw a DNA base pair and a single amino acid representation of a bidentate interaction.In the side chain of the amino acid E, there is a carboxylate group attached to the— α-carbon atom. β-carbon atom. γ-carbon atom. δ-carbon atom. ε-carbon atom.Which of the following descriptions best describes the composition of nucleotides? Group of answer choices A. a pentose sugar and a purine or pyrimidine B. a nitrogenous base, a phosphate group, and a pentose sugar C. a nitrogenous base and a pentose sugar D. a nitrogenous base and a phosphate group E. a phosphate group and an adenine or uracil
- Which of the following amino acids is unique in that it can bind both non-specifically to the DNA backbone as well as to specific DNA bases? a) Lysine b) Asparagine c) Arginine d) Phenylalanine e) LeucineWhich is not true of both ribonucleotides and deoxyribonucleotides? Both have a phospoether bond. Both have 3' OH groups. Both contain nitrogenous bases Both have a 5-membered sugar as part of the molecule. Both have 2' OH groupsDraw the chemical structure of a dinucleotide composed of A and G. Opposite this structure, draw the dinucleotide composed of T and C in an antiparallel (or upside-down) fashion. Form the possible hydrogen bonds.
- Which of the following pairs of amino acids can have intermolecular hydrogen bonding between the functional groups in their side chains? Select all that apply. phenylalanine and tyrosine two tyrosine residues serine and threonine alanine and threonineWhat does the "alpha" indicate in "α-helix"? It is a Greek helix. It's position lies above the beta-pleated-sheet. It has only the one enantiomer. It predominates in the 3º structure of the protein. None of these.Draw the dinucleotide AT and label the following: 5’ and 3’ ends Phosphodiester bond N-glycosidic bonds
- The R-group of lysine has an overall positive charge. The R-group of glutamic acid has an overall negative charge. Within the structure of a protein molecule, these two amino acids will: O attract each other O repel each other O form a disulfide bridge O form a pure covalent bondWhich of the following nucleotides is mostly likely to form pyrimidine dimers? a. dATP b. dTTP c. dCTP d. dGTP e. dUTPWith the following amino acid side chain can the side chain of threonine form hydrogen bonds? Q.) Phenylalanine