In light, purple sulfur bacteria use H₂S as an electron donor and release pure sulfur as a waste product.Purple sulfur bacteria are thus A) photoautotrophs. B) photoheterotrophs. C) chemoautotrophs. D) chemoheterotrophs. E) deep-sea, volcanic vent bacteria.

Question

Quizplus · Accepted Answer

Purple sulfur bacteria use light as a source of energy and H₂S as an electron donor, which makes them photoautotrophs. They release pure sulfur as a waste product, which indicates that they do not require external organic carbon sources and are capable of fixing carbon from CO2 via photosynthesis.

In Light, Purple Sulfur Bacteria Use H2S as an Electron

In Light, Purple Sulfur Bacteria Use H₂S as an Electron