Active transport requires energy to move materials from areas of low concentration to high concentration inside cells. It uses protein pumps to transport particles, like endocytosis which moves items into the cell and exocytosis which moves them out. Cell growth and reproduction are essential life processes where cells grow using genetic information and DNA to make needed proteins, and reproduce through mitosis and cytokinesis to pass genetic material to new daughter cells. Catabolism breaks down complex molecules while anabolism constructs complex living tissue from simpler substances using enzymes.