Question

QUESTION 39 Which best describes a type 3 secretion system? A system that allows bacteria to transfer virulence factors from one bacterium to another by horizontal gene transfer. A system that enables bacteria to directly injecting bacterial effector molecules into the cytoplasm of the host cell in order to alter its cellular machinery or cellular communication. A system that allows bacteria to sense their own population density by communicating with each other by way of secreted chemical factors and behaving as a population rather than as individual bacteria.

Answer 1

Type 3 secretory system is present in Gram negative bacteria which is pathogenic in nature for the transfer of effector proteins by the crossing of 3 membrane barrier and is injected into eukaryotic cell cytoplasm. The effector protein that is released into the cytoplasm of the host cell are capable of alteration in the the cellular machinery of the host cell , modulating the DNA machinery . It is seen in various disease like plague , typhoid fever and bacterial dysentery disease . 20 proteins combine to form type 3 secretary system mechanism along with the chaperonin system. The type 3 secretory protein system is important for the production of flagella and for the translocation of the effector protein into the cytoplasm of host cell. The pilus structure is also increase in their size for the modification and secretion of protein. The diagram shows the molecular level of type 3 secretory protein system.

Hence , option 2 is the correct answer .

Thanking you
Regards
Have a beautiful day ?
Good luck ✨
Please Hit the thumbs up ??

Piove Host cell cytoplasm Host cell membrane Polu Comprar paB.ToC, 16D Extra till Mxid Bacterial Acte membrane Trans membrong Domain Mvi 6, Mai ] Pabloon Bacterial Imer memberante ay mapanies Spak7, Spa4o , Mxi A Spa 33, MXIN, Mxik Bulb Fig. Type I seorakety peottin Kycken