X-ray Crystallography

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	It is the 51st picture taken by Francis Crick showing the structure of DNA.
	It helped scientist figure out what cells look like.
	It shows proof of alien life at area 51 in the Nevada desert.
	It was an X-ray diffraction photo that helped scientist discover the structure of DNA.

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Each type of protein has a unique shape.

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	True
	False

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X-ray diffraction can only be done on samples that are in crystal form.

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	True
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	the size of molecules.
	the structure of DNA
	the use of X-rays for taking pictures of bones.
	the shape of cells.

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Red light is made of longer wavelength light than blue light.

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	True
	False

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