Question Detail

MIC 121 MIC 121 Test compilation 4 Objective Question
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Question

Why might an undefined medium be chosen over a defined medium in microbiology?
Options
A Because it is necessary for autotrophic organisms
B Because it always has a higher pH
C Due to its ability to support microorganisms that cannot grow on defined media
Correct Answer
D Because it provides precise control over nutrient content
Correct Answer

Option C is the correct answer.

Detailed Explanation

Undefined media (also known as complex media) contain extracts (e.g., yeast extract, peptones) whose exact chemical composition is unknown. This makes them rich in a variety of nutrients and growth factors, making them suitable for cultivating fastidious or unknown microorganisms that have complex nutritional requirements and cannot grow on chemically defined media. Defined media offer precise control of nutrients, but are often insufficient for such microbes.

Hint

Think about what 'undefined' implies about the content and its benefit for diverse microbial needs, especially those with unknown or complex nutritional requirements.

Question Info

Course: MIC 121
Topic: MIC 121 Test compilation 4
Type: Objective
Difficulty: Not specified
Question 337 of 984
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