Certain viruses have been isolated in crytalline form and have been found to be_____________?
Correct answer: D. Nucleoproteins
- A. Nucleotides
- B. Phospholipids
- C. Scleroproteins
- D. Nucleoproteins
Explanation
Viruses can be crystallized because they behave as organized chemical particles, and their major structural form is nucleoprotein, made of nucleic acid associated with protein. Nucleotides and phospholipids alone do not describe a complete virus.
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