Chapter 8, Problem 15QP

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.