When X-rays are passed through crystalline DNA, it shows helix making one twist every:
Correct answer: B. 3.4nm
- A. 2nm
- B. 3.4nm
- C. 34nm
- D. 4nm
Explanation
The two strands of DNA are wound around each other so that there are 10 base pairs in each turn of about 3.4nm.
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The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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