What precursor is used to supply the nitrogen at position 9 in the structure below?

Which of the following proteins is responsible for replacing RNA primers with DNA during DNA replication?

What DNA damaging process leads to Hoogsteen base pairs?

Which enzyme catalyzes the reaction shown below?

In an individual assigned female at birth, how many X chromosomes will be found in non-gamete cells?

The structure below shows a section of double stranded DNA which contains 8-oxo-guanine. Which base will be the first to be removed in the base excision repair pathway?

Type the sequence of the complementary strand for the DNA strand shown below, making sure your answer goes from the 5′-end on the left to the 3′-end on the right. 5′-CGTAGCCGGTG-3′  

Which of the following drugs inhibits dihydrofolate reductase to prevent purine and thymidylate synthesis, AND is used to treat bacterial infections?

Which of the following drugs intercalates in DNA to inhibit transcription and replication, thereby treating cancer.

Which type of topoisomerases are involved in DNA replication?