51. Who discovered the double helix structure of DNA?
a) James Watson and Francis Crick
b) Rosalind Franklin
c) Maurice Wilkins
d) Linus Pauling
Answer: a) James Watson and Francis Crick
52. Who invented the first computer?
a) Charles Babbage
b) Alan Turing
c) John Atanasoff
d) Konrad Zuse
Answer: a) Charles Babbage
53. Who discovered the law of conservation of energy?
a) James Prescott Joule
b) Hermann von Helmholtz
c) Robert Mayer
d) James Clerk Maxwell
Answer: a) James Prescott Joule
54. Who invented the radio?
a) Guglielmo Marconi
b) Heinrich Hertz
c) Nikola Tesla
d) Alexander Popov
Answer: a) Guglielmo Marconi
55. Who discovered the theory of relativity?
a) Albert Einstein
b) Isaac Newton
c) Galileo Galilei
d) James Clerk Maxwell
Answer: a) Albert Einstein
