The HIV drug, Sustiva, is a competitive inhibitor of one of…

The HIV drug, Sustiva, is a competitive inhibitor of one of HIV’s enzymes called reverse transcriptase. Unfortunately, the high mutation rate of HIV means that the virus rapidly acquires mutations that make them resistant to these competitive inhibitors. Where in the reverse transcriptase enzyme would amino acid changes need to take place in order to render the drug useless?

NASA is planning a mission to examine the outer planets of t…

NASA is planning a mission to examine the outer planets of the solar system. Plants will be grown to produce oxygen and to recycle carbon dioxide. Since the spacecraft will be too far from the sun for photosynthesis, an artificial light source will be needed. If there is a system failure and the lights go dark, what will happen to CO2 levels?