Unlike eukaryotes, prokaryotes have no membrane-bound organelles, How then are prokaryotes able to generate energy?

Explanation

Prokaryotes generate energy through chemiosmosis, where proton gradients are formed across their plasma membranes, driving ATP synthesis. Unlike eukaryotes, which use mitochondria for this process, prokaryotes rely on their cell membranes. Option D is correct because it accurately describes this energy generation mechanism. Option A is incorrect because prokaryotes do generate energy. Option B is partially correct but doesn't address how energy is generated from photosynthetic processes. Option C is incorrect as prokaryotes lack mitochondria and instead use their plasma membranes for energy-related processes.