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Scientific inquiry in biology starts by observing the living species around you. What separates science from the other methods of seeking truth is that it is testable (e.g., one can devise experiments to test the validity of an idea); it is falsifiable (e.g., an experiment can reveal if an idea […]

1. The diagram below shows the DNA elements and associated factors that comprise the lac operon. Examine the diagram and answer the questions below a) List all the elements in this piece of DNA that act in cis. b) List all the elements in this piece of DNA that act […]

A 67-year-old retired male went to his doctor, complaining initially ofleg pain that started in his lower back, which then radiated down across the side of his thigh and over the front of his knee. Subsequently, he developed pain that radiated from his back to his front at two different […]

You sample a population of Salmonella typhimurium from a popular local hamburger joint Howdyburger. You find 9 isolates (clones) that are resistant to the antibiotics ampicillin and kanamycin, 32 isolates that are resistant to amipicillin but susceptible to kanamycin, and 51 isolates that are susceptible to both antibiotics. What is […]