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Why are vitamins added to some culture media?

Answer and explanation

Correct answer: To fulfill cofactor and growth factor needs of cells

The direct answer is A: fulfilling the cofactor and growth-factor needs of cells. A culture medium supplies energy, carbon, nitrogen, minerals, water, and sometimes special organic nutrients. Some cells cannot make all vitamins themselves, or they need vitamins as parts of coenzymes that help enzymes perform chemical reactions. Adding the required vitamin can therefore support metabolism, cell division, and product formation. Option A is correct because it identifies the nutritional and biochemical role of vitamins. Option B is wrong because vitamins do not transform a liquid medium into metal. Option C is wrong because vitamins are nutrients and are not added to break a fermenter. Option D is wrong because vitamins do not stop air; aeration is controlled by equipment and process conditions. The memory cue is: vitamins are small but essential helpers of enzymes and growth, not construction materials or air barriers.

Related tags

VitaminsGrowth FactorsCulture Medium

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