IMMUNOLOGY

OVERVIEW OF THE IMMUNE SYSTEM

THE GOOD BAD AND UGLY OF THE IMMUNE SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Bacteria harm cells by
A
destroying the cell and using it to make more bacteria.
B
producing toxins which interfere with how the cell normally works.
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Toxins may damage the eukaryotic cell membrane by combining with some structural component, or otherwise alter its function. Many toxins combine with specific receptors on the surface membrane, frequently glycoproteins or gangliosides, and penetrate the cell to reach their intracellular target.

Detailed explanation-2: -Bacterial toxins damage the host at the site of bacterial infection or distanced from the site of infections. Bacterial toxins can be single proteins or organized as oligomeric protein complexes and are organized with distinct AB structure-function properties.

Detailed explanation-3: -Many bacteria produce toxins, and in some cases, more than one toxin is produced by a given organism. Staphylococcus aureus strains, for example, are capable of secreting hemolysins, leukotoxins, exfoliative toxins, enterotoxins, and toxic shock syndrome toxin 1 (TSST-1).

Detailed explanation-4: -Bacterial toxins, typically the culprits of “food poisoning, ‘’ cause illness by the GI tract’s reaction to the toxin when ingested. The most common examples include Bacillus sp., Campylobacter sp., Clostridium sp., Salmonella sp., Shigella sp., Listeria sp., E.

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