Among the given items, statement 2 is correct because cell membrane is present both in plant and animal cells. Plant and animal cells are very similar because they are both eukaryotic cells. Ribosomes are non-membrane-bound organelles found in both eukaryotic as well as prokaryotic cells. The eukaryotes include all the protists, plants, animals and fungi. In eukaryotic cells there is an extensive compartmentalisation of cytoplasm through the presence of membrane-bound organelles. Mitochondria and chloroplasts are present in eukaryotic cells. Allprokaryotes have a cell wall surrounding the cell membrane except in mycoplasma. The fluid matrix filling the cell is thecytoplasm. There is no well-defined nucleus.