Answer
Some kinds of organelles are covered with a membranes and some are non-membraneous. Examples of the former are mitochondria, nucleus, lysosomes, golgi bodies, peroxisomes, vesicles and endoplasmic reticulum. The non-membranous category includes ribosomes, centrioles, cilia, microvilli, and microtubules.
Work Step by Step
Proteasomes, nucleosomes and several cytoskeletal elements --microfilaments, intermediate filaments and microtubules also belong to the category of non-membranous organelles
