can someone briefly describe to me what is cellular respiration and what it does within the cell?

Answer 1

As an open system , cells require a constant source of energy to carry out their life functions. The main source of energy for most living systems is the sun. Photosynthetic organisms capture sunlight and transform it into a useable source of energy via the chemical bonds in the organic compounds it produces. Cells uses some of this chemical bond energy to make ATP, the energy source for cellular work. Much of this energy is released as unusable heat. The products of respiration are the raw materials of photosynthesis. Chemical elements essential for life are recycled but energy is not.
Cellular Respiration. An ATP producing process in which the ultimate electron acceptor is an inorganic molecule, such as oxygen. It is the most prevalent and efficient catabolic process. It is an exergonic process producing a delta G of -686 kcal/mol.
The catabolic process of respiration transfers the energy stored in food molecules to ATP. If the energy of sugar molecules was released at one time the body could not use it efficiently. Organisms use ATP molecules to capture and release small amounts of energy to fuel various bodily functions. ATP is unique in its function as an energy transferrer. The molecule contains the nitrogenous base adenine connected to three molecules of phosphorous. The bonds between the last 2 phosphates are high energy bonds. When ATP releases the terminal (end) phosphate, energy is released while forming a new compound ADP. ADP can be refitted with another phosphate (phosphorylation) to form ATP again. Cellular respiration contains the steps to allow this process to occur.
In order for the most efficient production of ATP to occur the cell must transfer this energy from the chemical bonds of the organic compounds to the ATP molecule with minimal loss. The process involved is found in basic inorganic chemistry, the REDOX reactions. Redox is short for oxidation-reduction which involves partial or complete transfer of electrons from one reactant to another.

Answer 2

Cellular respiration is the multi-step process that cells use to break down glucose and change its energy into the energy of ATP. Respiration gives the cell energy for cell processes.

Answer 3

the process where glucose (sugar) is broken down into energy from ATP. Fermentation = anaerobic respiration