Test your knowledge with these top questions!
Which brand sold the first home pregnancy test kit in US drugstores?
The early kit used test tubes and took about two hours, far slower than the sticks sold today.
Which Jonas Salk vaccine rival developed an oral polio vaccine in 1961?
Sabin oral vaccine was licensed in 1961 and given on sugar cubes worldwide.
Which South African surgeon performed the first human heart transplant in 1967?
Christiaan Barnard transplanted a human heart in Cape Town on December 3 1967.
Two lines on a typical home pregnancy stick most often signal what condition?
Most sticks show one line for control and a second line only when enough hCG is present.
A standard home pregnancy test analyzes which bodily fluid?
Dip strips and midstream sticks both expose treated paper to urine, and a color change shows the result.
Which American virologist developed the first polio vaccine approved in the US in 1955?
Jonas Salk inactivated polio vaccine was declared safe in April 1955 after the largest US trial.
Home pregnancy test kits detect which hormone in urine?
The developing placenta makes hCG after implantation, so levels rise quickly in early pregnancy.
Who performed the first successful human kidney transplant in Boston in 1954?
Joseph Murray transplanted a kidney between identical twins in Boston on December 23 1954.
MRI grew from which earlier scientific technique?
Signals from atomic nuclei reveal local tissue differences after magnetic fields and radio waves manipulate the nuclei.
How does penicillin stop susceptible bacteria from growing?
The drug blocks enzymes that cross-link peptidoglycan, weakening the bacterial wall until susceptible cells rupture.