6. Who developed the first successful polio vaccine?
a) Albert Sabin
b) Jonas Salk
c) Edward Jenner
d) Louis Pasteur
Answer: b) Jonas Salk
7. Who discovered the role of DNA in heredity?
a) Friedrich Miescher
b) Oswald Avery
c) Erwin Chargaff
d) Avery, MacLeod, and McCarty
Answer: d) Avery, MacLeod, and McCarty
8. Who proposed the germ theory of disease?
a) Louis Pasteur
b) Robert Koch
c) Edward Jenner
d) Antonie van Leeuwenhoek
Answer: a) Louis Pasteur
9. Who discovered the first antibiotic, sulfa drugs?
a) Paul Ehrlich
b) Alexander Fleming
c) Gerhard Domagk
d) Edward Jenner
Answer: c) Gerhard Domagk
10. Who discovered insulin?
a) Frederick Banting
b) Charles Best
c) James Collip
d) All of the above
Answer: d) All of the above