The DNA molecule contains the code for building __.

• A. Proteins
• B. Carbohydrates
• C. Nucleotides
• D. Lipids

Answer: (A)

DNA holds the instructions for making proteins. Genes are sections of DNA that, when expressed, are first transcribed into messenger RNA and then translated by ribosomes to assemble amino acids into a polypeptide. This polypeptide folds into a functional protein that carries out most cellular tasks. The other options aren’t directly produced from the genetic code in the same way: carbohydrates are built from sugar units through metabolic pathways, not encoded as a final product by DNA; nucleotides are the building blocks of DNA itself, not the end product dictated by gene sequences; lipids are synthesized by cellular enzymes through distinct metabolic routes rather than being coded directly by a gene’s sequence.