If you describe something as rip-roaring, you mean that it is very exciting and full of energy. INFORMAL adj ADJ n. ...a rip-roaring movie with a great array of special effects. Translation English Cobuild Collins Dictionary. See also: rip off, ripe, ripen, ripple. Add your entry in the Collaborative Dictionary.
Adenosine triphosphate (ATP), a nucleotide composed of adenine, ribose, and three phosphate groups, is perhaps the most important of the so-called energy-rich compounds in a cell. Its concentration in the cell varies from 0.5 to 2.5 mg/mL of cell fluid.
Animal cells get energy from food, while plant cells get energy from sunlight. All cells use chemical energy. â¢ Chemical energy is the energy stored in the bonds between atoms of every molecule. To stay alive, cells must be able to release (not create) the chemical energy in the bonds. â¢ A major source of energy for most cells is stored in a sugar molecule called glucose. When you need energy, cells release chemical energy from glucose. You need food energy to run, walk, and even sleep.