Which organelles have no membranes, have one membrane, have two membranes?

Organelles that do not have membranes include the cell center (consists of centrioles, which in turn consist of microtubules), as well as ribosomes (protein synthesis). Organelles with one membrane include lysosomes (filled with enzymes, digest molecules), endoplasmic reticulum (smooth and rough, participates in the synthesis of substances necessary for the cell), the Golgi apparatus (a system of cisterns, ensures the accumulation and transport of substances through the cell). Organelles with two membranes include mitochondria (synthesize energy, in the form of ATP), plastids (synthesis of organics, by photosynthesis) and the nucleus (contains DNA, participates in RNA synthesis).

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