Question

multiple choice question
fastidious organisms ______.
○ do not require growth factors when grown in culture
○ grow on minimal media
○ require growth factors and/or complex nutrients
○ require simple nutrients when grown in culture

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Explanation:

Fastidious organisms are defined as those that have complex nutritional requirements. They need growth factors (like vitamins, amino acids) and/or complex nutrients (like blood, serum in media) to grow in culture. The first option is wrong as they do need growth factors. The second is wrong because minimal media has simple nutrients, which they can't use. The fourth is wrong as they need complex, not simple, nutrients. So the correct option is the one stating they require growth factors and/or complex nutrients.

Answer:

C. require growth factors and/or complex nutrients