What are the blueprints for cells?

• A. Genes, they contain all the instructions necessary to create the human body
• B. Blood type
• C. Hormones
• D. Proteins

Answer: (A)

Genes act as the blueprint because they carry the instructions that tell a cell what to build and how to function. The instructions are stored in DNA, and specific gene segments code for RNA and proteins. Those molecules then become the parts and machinery that make up cells—everything from cell membranes and structural elements to enzymes and receptors. In essence, gene activity directs which proteins are made, when they’re made, and in what amounts, guiding how cells grow, differentiate, and work.

Blood type is determined by a small set of genes, so it’s a trait influenced by genetics but doesn’t represent the full plan for building all cells. Hormones are signaling substances produced in response to gene activity and cellular processes, not the plan itself. Proteins are the outputs produced based on gene instructions, not the underlying blueprint that governs how cells are put together.