Which of the following are membrane bound structures?
I. Ribosome
II. Plasma membrane
III. Endoplasmic reticulum
IV. Golgi body.
The organelles present in the cytoplasm of the eukaryotic cells are essentially surrounded by their own unit membrane.
I. Ribosomes do not have any membrane. These are made up of ribonucleoproteins.
II. Plasma membrane that surrounds the whole cytoplasm itself is a membrane.
III. The endoplasmic reticulum is surrounded by a membrane.
IV. Golgi bodies are surrounded by a membrane.
Hence, the correct answer is 'II, III and IV'.