What is the chemical composition of cell organelles?
Your question is somewhat vague perhaps it should be what are the functions of these organelles? Plasma membrane and nuclear envelope are made of phopholipids and protein molecules embedded in them. The nucleus contains the chromosomes which means DNA and supporting proteins. The nucleoli produce the ribosomes which means proteins and RNA Cell walls are made of cellulose in plants, chitin in fungi, peptoglycans and/or protein in bacteria. Lysosomes, golgi bodies and endoplasmic reticulum and mitochondria contain enzymes which means proteins Ribosomes RNA and protein Plastids could contain chlorophyl for photosynthesis or stored starch, fat or protein Centrioles contain protein Vacuoles and cytoplasm contain all sorts of things.
