The mitochondria help cells to get energy from
molecules like sugars, proteins, and fats. All
living things need water, but they don’t break it
down for energy.
The main idea is that big, complicated
molecules store energy. When cells break down the
molecules, they can use the energy to do work.
The way they do it is a bit complicated, but they
use the energy they get from breaking down food
molecules to charge up another kind of molecule
called ATP. All of the parts of the cell use ATP
to do work.
Animals take in these big molecules by eating.
Fungi like mushrooms and yeast absorb food.
Plants make food themselves by getting energy from
the sun and putting water and carbon dioxide
together into sugar. This is called
photosynthesis. They can send the sugar all over
the plant where bigger things can be built from
the sugar, or the sugar can be broken down to get
the energy out.
Do you think plants have mitochondria?
If you are interested in how cells work, you
may want to be a cell biologist.
Thanks for asking,
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