Structure of DNA and RNA Quiz
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5 questions, one answer each
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1. Which base is found in RNA but not in DNA?
- A. Thymine
- B. Uracil
- C. Adenine
- D. Guanine
2. Which bond joins the sugar of one nucleotide to the phosphate of the next?
- A. Hydrogen bond
- B. Peptide bond
- C. Glycosidic bond
- D. Phosphodiester bond
3. A double-stranded DNA sample contains 18% thymine. What percentage is guanine?
- A. 18%
- B. 32%
- C. 64%
- D. 36%
4. A DNA section has 6 A–T pairs and 3 C–G pairs. How many hydrogen bonds hold its strands together?
- A. 21
- B. 18
- C. 15
- D. 27
5. How many phosphodiester bonds are in a single strand of 50 nucleotides?
- A. 50
- B. 51
- C. 49
- D. 100