Biotech primarily works with which of the following?

Biotechnology primarily focuses on DNA and proteins because these molecules are fundamental to biological processes and are central to the manipulation and understanding of living organisms. DNA contains the genetic blueprint that dictates how organisms develop and function, while proteins play crucial roles in virtually every biological activity, including catalysis, structural support, and signaling.

By working with DNA, biotechnologists can engage in genetic engineering, cloning, and the development of genetically modified organisms (GMOs), which are essential for advancements in medicine, agriculture, and research. Proteins are similarly crucial, as biotechnology often involves protein purification, characterization, and engineering for therapeutic purposes, such as designing medications or vaccines.

While small molecules, organisms, and chemical compounds also play significant roles in various fields of science and industry, they do not encapsulate the primary focus of biotechnology as comprehensively as DNA and proteins do.