In this article we will discuss about the presence of F factor in conjugation of bacteria. Bacterial cells may carry besides the main chromosome, one or more small DNA molecules in the cytoplasm called plasmids. Of the various kinds of plasmids, a few are involved in conjugation and are called conjugative plasmids. One such conjugative plasmid is the sex element [...]
In this article we will discuss about the meaning of site-specific recombinases of bacteria. During evolution of multiple antibiotic resistance, bacteria seem to have made use of enzymes known as site-specific recombinases. Each type of site-specific recombinase binds with a specific nucleotide sequence in double stranded DNA. When the site is present in each of the two duplex molecules, the [...]
The upcoming discussion will update you about the differences between Pili and Fimbriae. Difference # Pili: 1. They occur only in Gram negative bacteria. 2. The number is 1-4 per cell. 3. Pili are longer and broader. 4. They help in conjugation. 5. Formation of pili is controlled by F+ or fertility factor. 6. They are tubular structures. Difference # [...]