question_answer 43)

  Organelle without a cell membrane is (a) ribosome                      (b) Golgi apparatus         (c) chloroplast                   (d) nucleus

Answer:

  (c) Nucleus is sorrounded by two nuclear membranes both forming a nuclear envelope; Golgi apparatus is a set of membrane bounded, fluid filled visicles, vacuoles and  flattened cisternae. Plastids are also membrane bound organelle but ribosomes moves freely in the matrix or remain attached to the endoplasmic reticulum.