The correct answer is D. Synthesis of steroid hormone.
Smooth endoplasmic reticulum (SER) is a type of endoplasmic reticulum that is found in the cytoplasm of eukaryotic cells. It is a network of tubules and sacs that are involved in a variety of metabolic processes, including lipid synthesis, detoxification, and calcium storage.
SER does not synthesize steroid hormones. Steroid hormones are synthesized by the smooth endoplasmic reticulum in the adrenal glands, ovaries, and testes. They are a group of hormones that are derived from cholesterol and have a variety of effects on the body, including regulating metabolism, reproduction, and development.
A. Transport of materials: SER is involved in the transport of materials within the cell. It can transport lipids, proteins, and other molecules from one part of the cell to another.
B. Synthesis of lipid: SER is involved in the synthesis of lipids, including phospholipids, triglycerides, and cholesterol.
C. Synthesis of protein: SER is involved in the synthesis of proteins, including enzymes and hormones.