Antimicrobial Resistance and Natural Selection: The use of antimicrobial drugs began during the World War II era. After more than 50 years of widespread use, many antimicrobial drugs have become ineffective. Health authorities believe that antimicrobial resistance is the greatest health threat of the 21st century. What caused microbes to […]

As the lab instructor for Cell Bio, you need to make a solution of DCMU, an inhibitor of photosynthetic electron transport. You want a final concentration of 2×10^-5 M in a final volume of 1.25 mls, and this needs to be achieved using a 10 microliter shot from the pipet. […]

Pretend you are a top national microbologist reasearcher Your working at a remote field station and you’ve been given a container of undentified mostly microscopic. Your job is to determine if the organisms are bacteria, unicellular algae, or protozans. Unfortunatlly the electricity is out, so you can’t use your microscope. […]

Question: Tina put a culture of Escherichia cells in a medium containing glucose and nitrate (NO3-) on a shaker and turned on the shaker for aeration. The next day she had a nice dense culture of cells. When she repeated this procedure, she forgot to put the culture on the shaker. […]