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

What DNA damaging process leads to Hoogsteen base pairs?

Which of the following can correct thymine dimers in BOTH humans and bacteria?

Which of the following drugs inhibits type 2 topoisomerases to prevent DNA replication in bacteria?

At which of the indicated points in the scheme below does AMP NOT DIRECTLY act as a feedback inhibitor?

The starting material, intermediates and the product of the enzyme carbamoylphosphate synthetase are shown below. Using what you know about how molecules react and when ATP is generally needed, put the molecules in the order in which they are used/produced. Starting material: First intermediate: Second intermediate: Product:

Which is the only DNA repair mechanism that doesn’t involve removal of multiple nucleotides from one of the DNA strands?

What pathway does the reaction shown below belong to?

In the nucleic acid structure below, identify the 3′ end.

Which type of DNA structural problem is corrected by the base excision repair pathway without the use of a DNA glycosylase?