DNA is made up of _ different types of nucleotides.
Correct answer: B. Four
- A. Three
- B. Four
- C. Five
- D. Six
Explanation
DNA is made up of four different types of nucleotides: adenine (A), thymine (T), cytosine (C), and guanine (G). These nucleotides form the basic building blocks of the DNA molecule. The specific sequence of these nucleotides encodes the genetic information necessary for the development and functioning of living organisms. Options A, C, and D are incorrect because they do not match the established structure of DNA, which relies on precisely four nucleotide types.
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About Biological Molecules
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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