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Question

Which of the following exists in crystalline form?
  1. Bacteria
  2. Protozoa
  3. Viruses
  4. Algae

A
Protozoa
B
Viruses
C
Bacteria
D
Algae
Solution
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The structure of the viruses can be crystallised in which molecules are arranged and oriented in a specific manner to form a crystal. Generally, the crystals are composed of the protein particles which have three-dimensional structure and can be used to study the structure and the symmetry of the viruses. X-ray crystallography can be used to study the structure.
Thus, the correct answer is option C.

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