Parts of a Cell Quiz Questions and Answers

The cell is the basic structural and functional unit of life. Every cell consists of a cytoplasm enclosed within a membrane, which contains many biomolecules such as proteins and nucleic acids. Most plant and animal cells are only visible under a light microscope, with dimensions between 1 and 100 micrometers. Electron microscopy gives a much higher resolution showing a greatly detailed cell structure. Organisms can be classified as unicellular (consisting of a single cell such as bacteria) or multicellular. Most unicellular organisms are classed as microorganisms. The number of cells in plants and animals varies from species to species; it has been approximated that the human body contains roughly 40 trillion (4×1013) cells. The brain accounts for around 80 billion of these cells. Let's know more about cell.