FACT: All living things are made of cell(s)
We know that all living things are made of cells because we can see the cells under a microscope. Before the microscope was invented people didn't know that there were cells or that there were microorganisms such has bacteria. Plant cells normally have strong walls and are more square/rectangular in shape. Animal cells don't have a cell wall and so
We know that all living things are made of cells because we can see the cells under a microscope. Before the microscope was invented people didn't know that there were cells or that there were microorganisms such has bacteria. Plant cells normally have strong walls and are more square/rectangular in shape. Animal cells don't have a cell wall and so
Plant Cell
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Decomposer Cells
Images from: http://carbontime.bscs.org
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Animal Cell
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FACT: All cells are made of molecules
The main molecules in cells are proteins, carbohydrates, and fats. Fats make up cell membranes. Carbohydrates make up cell structures and can be broken down to release energy. Proteins are the doing molecules in cells. Proteins build other molecules, transport substances into and out of the cell, and communicate with other cells.
The main molecules in cells are proteins, carbohydrates, and fats. Fats make up cell membranes. Carbohydrates make up cell structures and can be broken down to release energy. Proteins are the doing molecules in cells. Proteins build other molecules, transport substances into and out of the cell, and communicate with other cells.
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Images from: http://carbontime.bscs.org
FACT: All molecules are made of atoms
Images from: http://carbontime.bscs.org
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Organic molecules such as Fats, Proteins, and Carbohydrates all contain CARBON, OXYGEN, and HYDROGEN atoms. Proteins also contain atoms of nitrogen. These molecules can burn as they contain high energy C-C or C-H bonds.
Cells also contain molecules of minerals and water. These molecules have atoms of nitrogen, oxygen, hydrogen, and phosphorus. As these molecules do not contain high energy C-C or C-H bonds they cannot be used for energy by the cell. |
FACT: Food can be used to build more cells, or it can be broken down to release the energy found in the bonds of the food molecules
The food we eat comes from living things. Food is organic, which means it has high energy bonds and can burn. When your body uses food for energy it breaks the high energy bonds in the food, releasing the energy. We also eat food in order to grow. The food we eat contains the molecules that are needed to make more cells.
The food we eat comes from living things. Food is organic, which means it has high energy bonds and can burn. When your body uses food for energy it breaks the high energy bonds in the food, releasing the energy. We also eat food in order to grow. The food we eat contains the molecules that are needed to make more cells.
When you buy food at the store it comes with a nutrition label. This label tells you what kind of molecules are found in the food and how much energy is stored in the bonds of the molecules.
Calories - measure energy
Molecules that contain energy are CARBOHYDRATES, PROTEINS, and FATS.
Fats include saturated and unsaturated fat as well as cholesterol.
Carbohydrates include sugar, fiber, and starch.
Non-energy molecules are vitamins, minerals, and water.
Images from: http://carbontime.bscs.org