There are four steps in bacterial conjugation. The second step is missing in this list. 1. Special sex pilus connects two cells. 2. 3. Each cell makes a complementary DNA strand. 4. The cells separate. Which is the missing step for the process of conjugation described?

After the sex pilus connects the two bacterial cells, a copy of some DNA passes from one cell into the other. Each cell then makes a complementary DNA strand, and the cells separate. Therefore, the missing step is “Some DNA moves from one cell to another.”

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