Question

The synthesis of complex molecules from simple molecules was proved by

• A. Arrhenius
• B. Pasteur
• C. Stanley Miller
• D. Redi

Answer 1

Answer: (C)

Stanley Miller

Answer 2

Stanley Miller proved that complex molecules synthesized from simple molecules. He created an atmospheie containing $H_{2},NH_{3},CH_{4}$ and water vapours in one large flask and allowed condensed liquids to accumulate in another small flask. Energy for apparatus was supported by heating the liquid as well as electric sparks from tungeston electrodes in the gaseous flask. Miller obtained a turbid liquid, which was rich by simple organic compounds such as urea, hydrogen cyanide, organic acids, sugars, purines, pyrimidines and amino acids. Arrhenius (1908) proposed panspermia theory, ie, organisms exist throughout the universe and their spores could travel from \ one planet to another. Louis Pasteur disproved the theory of spontaneous generation by performing a well designed experiment (swan-necked flask experiment). Francisco Redi was first to put forward experimental refutation of the concept of spontaneous generation.