Which four macromolecules are produced by anabolic reactions?

Which four macromolecules are produced by anabolic reactions?

• A. Carbohydrates, nucleic acids, proteins, lipids
• B. Nucleotides, amino acids, glycerol, cholesterol
• C. Carbohydrates, lipids, vitamins, minerals
• D. Monosaccharides, amino acids, fatty acids, nucleotides

Answer: (A)

Anabolic reactions build large, complex molecules from smaller units, using energy. The four macromolecules formed this way are carbohydrates, proteins, nucleic acids, and lipids. Carbohydrates are assembled from monosaccharides into polysaccharides like starch or glycogen. Proteins are built from amino acids linked by peptide bonds. Nucleic acids are formed from nucleotides to make DNA and RNA. Lipids are assembled from components like glycerol and fatty acids into larger lipid molecules such as triglycerides and phospholipids. The other options mix in monomers (monosaccharides, amino acids, nucleotides, glycerol, fatty acids) or include substances that aren’t macromolecules (like vitamins or minerals), so they don’t represent four large biological polymers produced by anabolic processes.

Anabolic reactions build large, complex molecules from smaller units, using energy. The four macromolecules formed this way are carbohydrates, proteins, nucleic acids, and lipids. Carbohydrates are assembled from monosaccharides into polysaccharides like starch or glycogen. Proteins are built from amino acids linked by peptide bonds. Nucleic acids are formed from nucleotides to make DNA and RNA. Lipids are assembled from components like glycerol and fatty acids into larger lipid molecules such as triglycerides and phospholipids.

The other options mix in monomers (monosaccharides, amino acids, nucleotides, glycerol, fatty acids) or include substances that aren’t macromolecules (like vitamins or minerals), so they don’t represent four large biological polymers produced by anabolic processes.