Question 18

Amino acids are linked together to form proteins.

Proteins are made up of long chains of amino acids that are linked together through peptide bonds. This process is essential for the structure and function of proteins in biological systems.

A) Vitamins

Vitamins are organic compounds that are essential for various metabolic processes in the body, but they are not directly involved in the formation of proteins. While they may play roles in protein metabolism or function, they do not link together to form proteins.

B) Amino acids

Amino acids are the building blocks of proteins, and they link together through peptide bonds to create polypeptide chains. This is the fundamental process in protein synthesis, making this option the correct answer.

C) Fats

Fats, also known as lipids, are a separate category of biomolecules that serve different functions in the body, such as energy storage and cell membrane structure. They do not link together to form proteins.

D) Monosaccharides

Monosaccharides are the simplest form of carbohydrates and serve primarily as energy sources or structural components in cells. They do not participate in the formation of proteins.

Conclusion

Amino acids are essential for the formation of proteins, as they are directly linked together to create the protein structure. All other options—vitamins, fats, and monosaccharides—serve different biological roles and do not contribute to protein synthesis, reinforcing that option B is the only correct answer.