Microbial Metabolism - Feeding the Microbe: Cell Nutrition

4 important questions on Microbial Metabolism - Feeding the Microbe: Cell Nutrition

What is the difference between macro nutrients and micronutrients?

Macronutrients are required in large amounts. Micronutrients are required in minute amounts.

What are two different types of micronutrients?

  • Trace elements
  • Growth factors

What are trace elements? Give examples.

Trace elements are metals that are required or otherwise metabolized by microorganisms. These metals typically function in the cell as cofactors or certain enzymes.
Example:  Fe, Zn, Mn, Cu, Co, B, Mo

What are growth factors? Give examples.

Growth factors differ from trace metals in that they are organic micronutrients.
Examples: vitamins, amino acids, purines, pyrimidines

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