The DNA molecule takes a complete turn after every .................. base pairs.

Explanation

To solve the question, "The DNA molecule takes a complete turn after every .................. base pairs," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of DNA**:
- DNA is a double-stranded molecule composed of nucleotides. Each nucleotide consists of a sugar, a phosphate group, and a nitrogenous base.

2. **Identify the Key Features of DNA**:
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