Which one is found only in RNA?
Correct answer: B. Uracil
- A. Cytosine
- B. Uracil
- C. Adenine
- D. Guanine
Explanation
The correct answer is B: Uracil. Uracil is a unique nitrogenous base found only in RNA. In contrast, DNA contains thymine instead of uracil. The other options, cytosine, adenine, and guanine, are present in both RNA and DNA, making them incorrect choices for this question.
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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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