Membrane - What is the thin layer that forms the outer boundary of a cell?, Chloroplast - What are the sites of protein synthesis?What is the site of photosynthesis in a plant cell?, mitochondra - What are the organelles that generate large quantities of energy in the form of adenosine triphosphate (ATP)?, Cellulose - Plant cell walls are composed of which material?, Cilium - What is one kind of filament that allows certain protozoans to move about?,

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