Question

multiple choice question

during which method of gene transfer are bacterial cells in direct contact?

transduction
conjugation
transformation

Explanation:

Identify the mechanism requiring physical contact

Bacterial conjugation is the transfer of genetic material between bacterial cells by direct cell-to-cell contact or by a bridge-like connection (sex pilus) between two cells.

Compare with other gene transfer methods

• Transduction is mediated by a bacteriophage virus and does not require direct bacterial contact.
• Transformation involves the uptake of naked DNA from the surrounding environment and does not require direct cell-to-cell contact.

Answer:

• Transduction
• Conjugation (Correct answer)
• Transformation