Genetics Quiz #2: Nucleotides

1. Which of the following nitrogenous bases is found only in DNA and not in RNA?

Question 1 of 6

2. Which of the following nucleotides is most commonly methylated in mammalian DNA?

Question 2 of 6

3. A first-year medical student is reviewing the structure of DNA for an upcoming exam. She examines an illustration depicting two anti-parallel strands of DNA nucleotides, highlighting the bonds between nucleotide bases and the sugar-phosphate backbone. Each nucleotide is shown to consist of a nitrogenous base, a sugar molecule, and a phosphate group. Based on this information, which of the following statements accurately describes the bonds and components involved in the structure of DNA?

     DNA Strands

Question 3 of 6

4. Which of the following describes the direction in which DNA polymerase adds nucleotides during DNA replication?

Question 4 of 6

5. A nucleotide is composed of which of the following components?

Question 5 of 6

6. Which enzyme is responsible for the addition of nucleotides to the growing DNA chain during replication?

Question 6 of 6


 

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