According to Koch's Postulates, in Order to Prove That Any

question 13

Multiple Choice

According to Koch's postulates, in order to prove that any given infectious agent causes a certain disease a scientist must satisfy all of the following requirements EXCEPT:

• A) the pathogen must be present in every case of the disease.
• B) the same pathogen must be reisolated in the diseased experimental host.
• C) the cultured pathogen must cause the disease when inoculated into a healthy and susceptible experimental host.
• D) the disease is caused by a combination of infectious pathogens and environmental factors.
• E) the pathogen must be cultured and isolated from every case of the disease.

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Definitions:

Chromoplasts

Plant cell organelles that contain pigments and are responsible for the colors of fruits and flowers.

Pigments

Substances that give color to materials by absorbing certain wavelengths of light and reflecting others, widely used in paints, inks, and biological functions.

Motor Proteins

Proteins that convert chemical energy into mechanical work, driving cellular movements such as muscle contraction and intracellular cargo transport.