NEET BIOLOGY

Detailed explanation-1: -The smooth endoplasmic reticulum (smooth ER) is continuous with the rough ER but has few or no ribosomes on its cytoplasmic surface. Functions of the smooth ER include: Synthesis of carbohydrates, lipids, and steroid hormones. Detoxification of medications and poisons.

Detailed explanation-2: -Smooth E R (SER) is associated with the production and metabolism of fats and steroid hormones.

Detailed explanation-3: -Smooth endoplasmic reticulum lacks ribosomes and helps synthesize and concentrate various substances needed by the cell.

Detailed explanation-4: -It includes the nuclear envelope, lysosomes, and vesicles, the rough and smooth endoplasmic reticulum and Golgi apparatus, which we will cover shortly.

Detailed explanation-5: -With this definition, an example of structures inside the cell that are not membrane-bound is the ribosomes. Nonetheless, other references consider ribosomes as organelles, specifically as a non-membrane-bound type (as opposed to the membrane-bound). Nevertheless, the ribosomes are not part of the endomembrane system.