Which type of post-translational modification does not occur in plastids?
Which type of post-translational modification does not occur in plastids?
Select an option to attempt
Correct Answer: Option A
Explanation
Pathogenesis sequence follows a logical cascade from initial host-pathogen contact to established disease: (1) Exposure — host encounters the pathogen (inhalation, ingestion, contact with contaminated surface/person). (2) Adhesion — pathogen attaches to host surface (epithelial cells, mucus) via specific adhesins binding to host receptors (e.g. pili binding to urinary epithelium; influenza HA binding to sialic acid). (3) Invasion — pathogen breaches physical barriers and enters tissues; some use toxins or enzymes (hyaluronidase, collagenase) to facilitate penetration; intracellular pathogens enter host cells. (4) Infection — pathogen multiplies, evades host immunity, produces toxins/effectors, and causes pathological damage. Order: Exposure → Adhesion → Invasion → Infection.