Which toxin is released by a living bacterial cell into its surroundings and is heat-labile?

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Multiple Choice

Which toxin is released by a living bacterial cell into its surroundings and is heat-labile?

Explanation:
Exotoxins are protein toxins that are actively secreted by living bacteria into their surroundings, and they are heat-labile because protein toxins lose activity when heated. This distinguishes them from endotoxins, which are part of the bacterial outer membrane and are released mainly upon lysis and are relatively heat-stable. Neurotoxins and enterotoxins are specific types of exotoxins that affect the nervous system and the gastrointestinal tract, respectively. Therefore, the toxin described is an exotoxin.

Exotoxins are protein toxins that are actively secreted by living bacteria into their surroundings, and they are heat-labile because protein toxins lose activity when heated. This distinguishes them from endotoxins, which are part of the bacterial outer membrane and are released mainly upon lysis and are relatively heat-stable. Neurotoxins and enterotoxins are specific types of exotoxins that affect the nervous system and the gastrointestinal tract, respectively. Therefore, the toxin described is an exotoxin.

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