関連ワード:  function of ribosome in a plant cell    function of nucleus in a plant cell    function of cytoplasm in a plant cell    function of mitochondria in a plant cell    function of nucleolus in a plant cell    function of endoplasmic reticulum in a plant cell    function of smooth er in a plant cell    function of rough er in a plant cell    function of golgi in a plant cell    main function of ribosomes in a plant cell