EVERYDAY SCIENCE

Detailed explanation-1: -Non membranous organelles of a cell include cytoskeleton, microvilli, centrioles, cillia, flagella, ribosomes while membranous organelles include mitochondria, nucleus, endoplasmic reticulum, golgi apparatus, lysosomes, peroxisomes, vesicles.

Detailed explanation-2: -Membrane-bound ribosomes, attached to the cytosolic side of the ER membrane, are engaged in the synthesis of proteins that are being concurrently translocated into the ER. Free ribosomes, unattached to any membrane, synthesize all other proteins encoded by the nuclear genome.

Detailed explanation-3: -Single membrane-bound organelles: Vacuole, Lysosome, Golgi Apparatus, Endoplasmic Reticulum are single membrane-bound organelles present only in a eukaryotic cell. Double membrane-bound organelles: Nucleus, mitochondria and chloroplast are double membrane-bound organelles present only in a eukaryotic cell.

Detailed explanation-4: -Endoplasmic reticulum (ER) is a system of membrane-lined channels found in all eukaryotic cells except mature erythrocytes. It constitutes more than 30 to 60 percent of total cell membranes. It provides protein and lipid to form the structure of cell membrane.