Meiosis is the process of division in the nucleus of some cells of the sex organs. It reduces the number of chromosomes in sex cells to half the number found in somatic cells. They transform chemical energy from food into an energy form the cell can use. Mitosis is the process of division in the nucleus of a cell in which two identical daughter nuclei are produced, each containing two sets of chromosomes. Nucleus is the structure in a eukaryotic cell that contains the cell's hereditary material.
Organelles are structures inside the cell that have a specific function.
They include the endoplasmic reticulum, mitochondria, nucleus, and ribosomes. Proteins are substances made up of amino acids. A cell's structures are built chiefly of proteins. Proteins called enzymes speed up chemical reactions in a cell. Ribosomes are tiny bodies in a cell that are involved in protein production.