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41544_Ward's World+MGH Nanotechnology

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5 + ward ' s science 5 Nanotechnology: Test Your Understanding Teacher's Guide How long is a nanometer compared to a millimeter? Because a nanometer is one billionth of a meter, and a millimeter is one thousandth of a meter, a nanometer is one millionth of a millimeter. How is a ribosome an example of a biological nanosystem? A nanosystem manufactures components at the molecular level. Because a ribosome manufactures protein molecules from amino acids in a directed fashion, it can be described as a biological nanosystem. Critical Thinking: How might nanotechnology impact the field of cell biology in the future? Sample answer: Because nanomaterials are minuscule when compared to the size of a cell, nanosys- tems could function within a cell, allowing biologists to manipulate the internal workings of a cell.

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