Question

there are four steps in bacterial conjugation. the second step is missing in this list.

1. special sex pilus connects two cells.

2.

1. each cell makes a complementary dna strand.
2. the cells separate.

which is the missing step for the process of conjugation described?
○ two new, identical cells are produced.
○ the cell membrane elongates and pinches off.
○ some dna moves from one cell to another.
○ a dna molecule attaches to the cell membrane.

Explanation:

Bacterial conjugation involves transferring genetic material (DNA) between two bacterial cells. After the sex pilus connects the cells (step 1), the next step is the transfer of DNA from one cell to the other. Let's analyze the options:

• "Two new, identical cells are produced" is a result of binary fission, not conjugation's second step.
• "The cell membrane elongates and pinches off" is part of binary fission or cell division, not conjugation.
• "A DNA molecule attaches to the cell membrane" is not a typical step in conjugation after the pilus connects.
• "Some DNA moves from one cell to another" fits between the pilus connection (step 1) and DNA replication (step 3) in conjugation.

Answer:

C. Some DNA moves from one cell to another.