An antibiotic targets the 30s subunit of a bacterial ribosome. A mutation of what kind would be the most effective form of resistance?

Penicillin was purified and mass produced for human medicine in the early 1940s. Resistance to the antibiotic was seen within a couple of years. In some cases, research has documented resistance to some antibiotics before the drugs are even used in medicine. Which of the following is the best explanation for these patterns of resistance?

Gram-negative bacteria limit how much antibiotic they take in by thickening the cell wall.

Which of the following is not evidence for the use of penicillin or other mold products prior to Fleming’s experiment?

What was the policy known as when the United States offered support to Greece and Turkey in the form of financial assistance, weaponry, and troops to help train their militaries and bolster their governments against Communism?

What was the name given to American policymaker’s strategy of containment under the Eisenhower administration, hoping to prevent entire regions to be controlled by the Soviets?

This plan stipulated that the European nations had to work together in order to receive aid, thus enforcing unity through enticement, while seeking to undercut the political popularity of French and Italian Communists and dissuading moderates from forming coalition governments with them.

In which of the following Supreme Court cases did Thurgood Marshall, then chief counsel for the NAACP, successfully argued the landmark that the practice of segregation in public schools made African American students feel inferior, even if the facilities provided were equal in nature, the Court noted in its decision, the very fact that some students were separated from others on the basis of their race made segregation unconstitutional?

What was it called when the Allies were unwilling to abandon Berlin, so the United States, Great Britain, and France began to deliver all needed supplies to West Berlin by air to circumvent the Soviet blockade of the city?

What was the name given to the “massive retaliation”  plan for nuclear response where both the United States and Soviet Union would be destroyed if one country decided to launch nuclear armaments against the other?