The nitrogen bases in the polynucleotide chain are oriented toward the interior. Give reason for the specific orientation.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Structure of DNA:**
- DNA is composed of two strands that form a double helix. Each strand is made up of a sequence of nucleotides, which consist of a sugar, a phosphate group, and a nitrogen base.

2. **Identifying the Components of Nucleotides:**
- The nitrogen bases in DNA are adenine (A), thymine (T), cytosine (C), and guanine (G). These bases are attached to the sugar molecule in the nucleotide.

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