DNA Structure, Replication, And Repair Practice Test

A 28-year-old woman is treated with ciprofloxacin for a complicated urinary tract infection caused by E. coli. The antibiotic is effective, and her symptoms resolve within a few days. Ciprofloxacin is a fluoroquinolone antibiotic that interferes with bacterial DNA synthesis.

A 35-year-old woman seeks genetic counseling due to a strong family history of cancer. Her mother and a maternal aunt were diagnosed with breast cancer before age 50, and her maternal grandmother died from ovarian cancer. Genetic testing reveals a pathogenic mutation in the BRCA1 gene.