Select all that applyWhich of the following are examples of pathogen-associated molecular patterns?Multiple select question.Lipopolysaccharides in gram-negative bacteriaBacterial piliViral RNAsPeptidoglycanThe cholera toxin

The examples of pathogen-associated molecular patterns (PAMPs) from the options provided are:

1. Lipopolysaccharides in gram-negative bacteria: These are large molecules found in the outer membrane of Gram-negative bacteria, and they are recognized by the immune system as PAMPs.

2. Viral RNAs: These are molecules produced by viruses that can be recognized by the immune system as PAMPs.

3. Peptidoglycan: This is a polymer consisting of sugars and amino acids that forms a mesh-like layer outside the plasma membrane of most bacteria, forming the cell wall. The immune system recognizes peptidoglycan as a PAMP.

Bacterial pili and the cholera toxin are not considered PAMPs. Bacterial pili are appendages that allow bacteria to attach to other cells, but they are not recognized by the immune system as PAMPs. The cholera toxin is a protein complex secreted by the bacterium Vibrio cholerae, which causes cholera. While it is a virulence factor and can stimulate an immune response, it is not a PAMP.