Final answer:
Cells perform three main kinds of work: building complex molecules, transporting materials, and powering movement.
Step-by-step explanation:
Cells perform three main kinds of work: building complex molecules, transporting materials, and powering movement.
As an example of building complex molecules, cells use energy to synthesize molecules like proteins and nucleic acids. This is important for growth and repair in the body.
For transporting materials, cells use energy to move substances across their cell membranes or within the cell. For example, cells in the digestive system use energy to absorb nutrients from food.
Powering movement is another important work that cells do. Muscles cells, for instance, use energy to contract and create movement in our bodies.