21. Who discovered the structure of the ribosome?
a) Albert Claude
b) George Palade
c) Christian de Duve
d) All of the above
Answer: d) All of the above
22. Who is known for developing the concept of “survival of the fittest” in evolution?
a) Charles Darwin
b) Alfred Russel Wallace
c) Ernst Mayr
d) Thomas Hunt Morgan
Answer: c) Ernst Mayr
23. Who discovered the bacterium that causes tuberculosis?
a) Robert Koch
b) Louis Pasteur
c) Edward Jenner
d) James Watson
Answer: a) Robert Koch
24. Who discovered the role of chromosomes in heredity?
a) Thomas Hunt Morgan
b) Oswald Avery
c) Erwin Chargaff
d) Avery, MacLeod, and McCarty
Answer: a) Thomas Hunt Morgan
25. Who proposed the theory of spontaneous generation?
a) Francesco Redi
b) Louis Pasteur
c) Antonie van Leeuwenhoek
d) Robert Koch
Answer: c) Antonie van Leeuwenhoek
