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Teacher Resources

Are nutrient agar and agar the same?

No, agar itself contains very little nutritive capacity for an organism to survive on. Additives, or nutrients, must be added to sustain the growth of organisms. A simple and inexpensive culture medium consists of 15 g of agar, 2 beef bullion cubes, and 1 L of deionized or distilled water. Heat and stir the mixture to a gentle boil. This media will support adequate growth of many bacterial species.

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