Which of the following factors favors the formation of the Random DNA Coil? a Enthalpy b Base-Pairing c Phosphate group interactions d Stacking Energies
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Which of the following factors favors the formation of the Random DNA Coil?
| a |
Enthalpy |
|
| b |
Base-Pairing |
|
| c |
Phosphate group interactions |
|
| d |
Stacking Energies |
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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.Make the complementary strand for the following DNA template and label both strands as 5 to 3 or 3 to 5 (P = phosphate in the diagram). Draw an arrow showing the direction of synthesis of the new strand. How many hydrogen bonds are in this double strand of DNA? template: PAGGCTCGOH new strand:Which of the following factors favors the formation of the Random DNA Coil? Base-Pairing Enthalpy Phosphate group interactions Stacking Energies
- Which of the following changes occur with a double-stranded DNA if it is heated to 95 C at neutral pH? OA Increase in the absorption of uitraviolet light at 260 nm OB. Unwinding of the helical DNA structure Oc Separation of the two DNA strands Do.Hydrolysis of the N-glycosidic bond belween the base and deoxyribose DE Breakage of the phosphodiester bonds belwean adjacent ucieotides Dr. Breakage of the hydrogen bonds between guanines and cytidines.which type of base pairs uf any allow the dna to remain double dtranded at higher temperature? gc at both neitherGiven the active site diagram below, please identify the residue participating in a charge-charge interation. HO OH HN OH 5 ΝΗ *HN ΝΗ OH O Zn²+ 2 4 5 3 1 2 NH 3
- A circular double-stranded DNA molecule contains 4200 base pairs. Insolution, the molecule is in a B-form helix, with about 10.5 base pairsper turn. The DNA circle has 12 superhelical turns. What is its superhelixdensity s?The base pairing that happens is maintained at around 0.30nm to maintain the diameter of the helix. True FalseWhich of the following statements about the DNA double helix is FALSE? O The base pairs are located in the center of the helix O The plane of the base pairs is perpendicular to the direction of the deoxyribose- phosphate backbone O The two strands have the same 5' to 3' direction (i.e, are parallel) O The base pairs stack on one another O The deoxyribose-phosphate backbone is on the outside of the helix
- The phenomenon where double-helical DNA absorbs UV light less than does single-stranded DNA is referred to as intercalation hyperchromism hypochromism base-stacking None of the these are correct.Which of the following base pairs is/are not possible in B-DNA? H O A and B O A and C O only A O only B O Band C O only C O all of them O none of themIn an analysis of the number of different bases in a DNA sample, which result would be consistent with the base-pairing rules? * A+T>G+C O AC+T
