Which statement best describes the way that an adenosine diphosphate (ADP) molecule becomes an adenosine
triphosphate (ATP) molecule in the human body?
A
Protein causes phosphate molecules to bind to sugars and form ATP.
B.
Food energy is used to attach a phosphate molecule to an ADP molecule.
C. lonized oxygen in cells causes sugars and phosphate molecules to form ATP.
D.
Water breaks down ADP molecules which form into ATP molecules over time.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.