160 Chapter 14 DNA Structure DNA Molecule DNA is an extremely thin, long, ladder-like molecule that has two ICI rails" made of sugar and phosphate, and many "rungs" made of special complementary...

Extracted text: 160 Chapter 14 DNA Structure DNA Molecule DNA is an extremely thin, long, ladder-like molecule that has two ICI rails" made of sugar and phosphate, and many "rungs" made of special complementary bases. The DNA bases (rungs) are molecular units that combine only in two kinds of pairs. The base adenine (A) always will be paired with thymine (T), and cytosine (C) is always paired with guanine (G). Therefore, if you know one of the complementary bases, you can easily figure out the other. The term nucleotide is used as a name for the repeating subunits in a DNA molecule. A nucleotide is actually a phosphate, a sugar, and a base hooked together as a basic building unit. -Two complementary base "rungs" G C} A CT Sugar and phosphate "rails" ? QUESTION 1. Guanine always pairs with 2. Thymine always pairs with 3. Fill in the complementary nucleotides in the DNA ladder to the left.