Chemical Evolution Model Systems Quiz
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Questions and Answers

What is the main idea behind the prebiotic soup model?

  • Synthesis of molecules from volcanic eruptions
  • Synthesis of molecules from deep sea vents
  • Synthesis of molecules from gases in the atmosphere (correct)
  • Synthesis of molecules from sunlight

Who proposed the surface metabolism model?

  • J.B.S. Haldane
  • Alexander I. Oparin (correct)
  • Charles Darwin
  • Stanley Miller

In what year did Stanley Miller perform the breakthrough experiment testing the prebiotic soup model?

  • 1945
  • 1924
  • 1953 (correct)
  • 1967

What gases were present in Earth's early atmosphere in Stanley Miller's experiment?

<p>Methane, Ammonia, Hydrogen (D)</p> Signup and view all the answers

What was the experimental setup designed to represent in Stanley Miller's experiment?

<p>Early Earth's atmosphere (D)</p> Signup and view all the answers

Which scientist first proposed the Oparin–Haldane hypothesis?

<p>Alexander I. Oparin (A)</p> Signup and view all the answers

What crucial component did the electrical discharges in Miller's experiment add to the reaction mix?

<p>Pulses of intense electrical energy (C)</p> Signup and view all the answers

What color did the solution in the boiling flask turn after a day of continuous boiling and sparking in Miller's experiment?

<p>Pink (D)</p> Signup and view all the answers

Why did Miller boil the water constantly in his experiment?

<p>To add water vapor to the mix of gases (B)</p> Signup and view all the answers

What is a common misconception about the starting molecules used in Miller's experiment at the boiling point of water?

<p>They are unstable and undergo spontaneous chemical reactions (B)</p> Signup and view all the answers

What were the two poisonous chemicals found by Miller when he analyzed samples from the mini-ocean?

<p>Hydrogen cyanide and formaldehyde (D)</p> Signup and view all the answers

What type of energy would have been required for the substrates in Miller's experiment to react without the addition of electrical discharges?

<p>Light energy (A)</p> Signup and view all the answers

What was the significance of the broth in the straight-necked flask being exposed to preexisting cells?

<p>It indicated that the broth was contaminated with impurities. (B)</p> Signup and view all the answers

What conclusion can be drawn from the swan-necked flask remaining sterile even after months of standing?

<p>The experiment supported Pasteur's data and conclusions. (A)</p> Signup and view all the answers

Which statement accurately describes the composition of atoms in organisms today?

<p>Hydrogen is the most abundant atom in organisms. (B)</p> Signup and view all the answers

What is the role of isotopes in the context of atoms?

<p>Isotopes have different numbers of protons but the same number of neutrons. (B)</p> Signup and view all the answers

What is the atomic weight of an element based on?

<p>The average mass of all isotopes present in nature. (D)</p> Signup and view all the answers

How did Louis Pasteur's results impact biologists' understanding of cell generation?

<p>Pasteur's data led biologists to reject spontaneous generation. (A)</p> Signup and view all the answers

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