This document discusses the structure and components of cells. It covers the following key points in 3 sentences: The main components of cells include the nucleus, which contains DNA and controls the cell's hereditary material, organelles like chloroplasts and mitochondria that have specialized functions, and a cell membrane that encloses and protects the cell. Cells also contain proteins, lipids and carbohydrates that carry out important functions like photosynthesis, energy production and cell signaling. Plant cells contain chloroplasts that allow them to carry out photosynthesis to produce glucose from sunlight through the process of absorbing carbon dioxide and releasing oxygen.