Which of the following is NOT a function of enzymes in the smooth endoplasmic reticulum?

A. Hydrogen, carbon, potassium, nitrogen: While hydrogen, carbon, and nitrogen are major elements in the human body, potassium is a trace element and does not contribute significantly to the 96% composition.

B. Carbon, nitrogen, oxygen, hydrogen: These four elements constitute approximately 96% of the human body. They form the building blocks of organic molecules such as proteins, carbohydrates, lipids, and nucleic acids, making them essential for life.

C. Phosphorus, calcium, nitrogen, hydrogen: Phosphorus and calcium are important elements, particularly in bones and energy molecules, but they are present in much smaller amounts compared to carbon, hydrogen, oxygen, and nitrogen.

D. Calcium, helium, oxygen, nitrogen: Helium is not a biological element in the human body, and while calcium, oxygen, and nitrogen are present, this set does not reflect the four major elements that make up 96% of body composition.

A. Proteins: Proteins serve as the primary structural components of cells and tissues. They form muscles, connective tissue, enzymes, and cell membranes, providing strength, support, and functional versatility throughout the body.

B. Carbohydrates: Carbohydrates primarily provide energy and serve as short-term fuel and structural components like glycogen, but they are not the main structural material of the body.

C. Lipids: Lipids function as energy storage, insulation, and components of cell membranes, but they do not provide the bulk structural framework of tissues.

D. Nucleic acids: Nucleic acids such as DNA and RNA store and transmit genetic information but do not serve as the primary structural material for the body.