Electrons to reduce CO₂ can come from : Glucose
Most Non-sulphur Green and purple bacteria are photoheterotrophs because they use light as a source of energy while getting their reducing power from the electrons of glucose.
Green and purple bacteria uses sunlight but do not give out oxygen in return and they do not use only CO₂ as their carbon source, but uses electrons of glucose to reduce CO₂.
Hence we can conclude that Electrons to reduce CO₂ can come from : glucose
Learn more about green and purple bacteria : https://brainly.com/question/4468098
