11. Who is known for developing the vaccine for smallpox?
a) Edward Jenner
b) Louis Pasteur
c) Robert Koch
d) Jonas Salk
Answer: a) Edward Jenner
12. Who discovered the electron microscope?
a) Ernst Ruska
b) Robert Hooke
c) Antonie van Leeuwenhoek
d) Hans Christian Gram
Answer: a) Ernst Ruska
13. Who discovered the laws of inheritance?
a) Gregor Mendel
b) Thomas Hunt Morgan
c) Friedrich Miescher
d) Rosalind Franklin
Answer: a) Gregor Mendel
14. Who proposed the phage theory of bacterial infections?
a) Max Delbrück
b) Salvador Luria
c) Alfred Hershey
d) All of the above
Answer: d) All of the above
15. Who discovered the principle of vaccination?
a) Edward Jenner
b) Louis Pasteur
c) Robert Koch
d) Jonas Salk
Answer: a) Edward Jenner
