Extensive network of membrane bounded tubules and sacs that produces and modifies proteins and synthesizes lipids.

Extensive network of membrane bounded tubules and sacs that produces and modifies proteins and synthesizes lipids.

• A. Golgi apparatus
• B. Lysosome
• C. Peroxisome
• D. Endoplasmic Reticulum

Answer: (D)

This describes the endoplasmic reticulum, a vast network of membrane-bounded tubules and sacs that stretches from the nuclear envelope throughout the cytoplasm. It forms an interconnected transport system. The rough region, studded with ribosomes, carries out protein synthesis for secreted, membrane, and lysosomal proteins, with initial folding and processing happening there. The smooth region, lacking ribosomes, specializes in lipid synthesis and also participates in other activities like detoxification. Together, this network handles producing proteins and lipids and begins their processing, before proteins move on to the Golgi for further modification and sorting. The other organelles don’t form this extensive interconnected membrane network: the Golgi apparatus, for example, stacks and modifies and packages, while lysosomes and peroxisomes are single, specialized compartments.

This describes the endoplasmic reticulum, a vast network of membrane-bounded tubules and sacs that stretches from the nuclear envelope throughout the cytoplasm. It forms an interconnected transport system. The rough region, studded with ribosomes, carries out protein synthesis for secreted, membrane, and lysosomal proteins, with initial folding and processing happening there. The smooth region, lacking ribosomes, specializes in lipid synthesis and also participates in other activities like detoxification. Together, this network handles producing proteins and lipids and begins their processing, before proteins move on to the Golgi for further modification and sorting. The other organelles don’t form this extensive interconnected membrane network: the Golgi apparatus, for example, stacks and modifies and packages, while lysosomes and peroxisomes are single, specialized compartments.