How metabolically diverse are microorganisms?

Prepare for the Microbial Metabolism Test. Utilize flashcards and multiple choice questions with helpful hints and detailed explanations. Ace your test with ease!

Metabolism in microorganisms can be incredibly diverse; many microbes carry a wide array of enzymes that let them exploit many different compounds as food and energy sources. A striking example is Pseudomonas aeruginosa, which can metabolize more than 100 different substrates, showing how broad a single microbe's catabolic toolkit can be. This kind of versatility isn’t limitless—substrate use depends on the organism’s enzymes and how they’re regulated—so it’s not true that every substrate is usable by every microbe. It’s also not accurate to say they metabolize only carbohydrates; microbes process amino acids, organic acids, fats, and diverse environmental compounds as well. They can even break down aromatic compounds, illustrating how expansive microbial metabolism can be. So the statement that highlights a concrete, high degree of substrate versatility, exemplified by a capable organism metabolizing many substrates, best captures how metabolically diverse microorganisms can be.