Final answer:
The majority of molecular switches and machines are made from polymers, large molecular structures formed from repeating monomers connected by covalent bonds, driving specific biochemical actions like an assembly line in various applications.
Step-by-step explanation:
The majority of molecular switches and machines are made from large, complex molecular structures known as polymers. These polymers are formed from repeating structural units called monomers, which combine through a series of carefully controlled chemical reactions to form very high molecular mass compounds. These polymers are crucial in various applications due to their versatility and properties, such as being molded into different shapes, and form the foundation of countless biochemical machines that function like an assembly line to drive specific actions. In essence, these polymers act as the building blocks for many of the molecular materials we encounter in everyday life, ranging from consumer goods to sophisticated devices like cell phones.