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MIC 121 Mcb compilations Objective Question

Question

What distinguishes a defined medium from an undefined medium?
Options
A Defined medium has known quantities of all ingredients
Correct Answer
B Undefined medium is only used for eukaryotic cells
C Defined medium is more expensive than undefined medium
D Defined medium contains complex ingredients like yeast extract
Correct Answer

Option A is the correct answer.

Detailed Explanation

A defined medium (or synthetic medium) is one in which the exact chemical composition, and thus the precise quantity of each ingredient, is known. Undefined (or complex) media contain components like yeast extract, meat extract, or peptones, which have variable chemical compositions.

Hint

Consider the meaning of 'defined' in a scientific context. What aspect of the medium's composition would be clearly specified?

Question Info