Your body does exactly that when you eat your food. Here's a brief video lecture that summarizes this concept. Living things break down the three major categories of foods proteins, fats, and carbohydrates into their constituent parts, the individual lego blocks, for two reasons.
ATP Adenosine tri-phosphate is an important molecule found in all living things. The energy holding that phosphate molecule is now released and available to do work for the cell. When the cell has extra energy gained from breaking down food that has been consumed or, in the case of plants, made via photosynthesis , it stores that energy by reattaching a free phosphate molecule to ADP, turning it back into ATP.
The ATP molecule is just like a rechargeable battery. There are times when the cell needs even more energy, and it splits off another phosphate, so it goes from ADP, adenoside di-phosphate, to AMP, adenosine mono-phosphate. Think of the others as different brands of rechargable batteries that do the same job. What about oxygen?
Why do we need that? What happens if you put a glass over a candle? You starve the fire of oxygen, and the flame flickers out. ATP is a nucleotide consisting of an adenine base attached to a ribose sugar, which is attached to three phosphate groups.
These three phosphate groups are linked to one another by two high-energy bonds called phosphoanhydride bonds. When one phosphate group is removed by breaking a phosphoanhydride bond in a process called hydrolysis, energy is released, and ATP is converted to adenosine diphosphate ADP. This free energy can be transferred to other molecules to make unfavorable reactions in a cell favorable. Related Concepts 7. You have authorized LearnCasting of your reading list in Scitable.
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