Conjugation

Bacterial cells, for which a cross-section is shown here, can mate by a process called conjugation. Conjugation involves the transfer of a circular plasmid DNA from a donor to a recipient cell, beginning at a specific origin of transfer. The donor cell contacts the recipient cell and a pore forms between their adjacent membranes. The plasmid is transferred from a single-stranded nick at its origin. During transfer, the plasmid from the donor cell is replicated. When both cells contain double stranded plasmids, the conjugated pair separates.

Question 1: What happens in conjugation?
  1. Cells make contact
  2. DNA is transfered
  3. DNA is replicated
  4. All of the above


Answer 1

Answer - (d) All of the above

Question 2: During conjugation, when the donor cell contacts the recipient cell, a ________ forms between their adjacent membranes.
  1. Ring
  2. Dent
  3. Pore
  4. Spot


Answer 2

Answer - (c) pore