In this chapter, we have focused on genetic systems present in bacteria and on the viruses that use bacteria as hosts (bacteriophages). In particular, we discussed mechanisms by which bacteria and their phages undergo genetic recombination, which allows geneticists to map bacterial and bacteriophage chromosomes. In the process, we found many opportunities to consider how this information was acquired. From the explanations given in the chapter, what answers would you propose to the following questions? How do we know whether or not genetic recombination between bacteria involves cell-to-cell contact?

Video transcript

Hello everyone and welcome to today's video. So which of the following structure mediates the physical interaction during conjugation in bacteria. Let's go over each of these structures to determine their function. Beginning by structure A capsule that capture is used for bacteria to adhere to surfaces. Is not going to be involved in conjugation. So we're going to cancel this out. Then we have the cell wall, the cell wall surrounds the bacteria and it's going to allow for protection among many other things. So we're going to cancel that as well. It is not really involved in conjugation. Then we have the flag L. A. And the L. A. Is a structure that's involved in movement. Again, not really involved in conjugation. So we're going to cancel this out and then we have the f pilots and the f pilots is going to be this connection. This physical connection that is going to be formed between two bacteria from which something like the F plasmid. I can travel and be transferred from one bacterium to another. This act is going to be turned as conjugation. So the F pilots is going to be the structure that mediates the physical interaction during conjugation. We're going to highlight answer choice B. As the final answer to our question. I really hope this helped you and I want to see you on the next one