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BIO NMDCAT Concept of Evolution
nmdcat.online July 14, 2026

14. If the Miller-Urey experiment were repeated with abundant oxygen replacing methane and hydrogen, the expected yield of amino acids would most likely:

A. Increase significantly
B. Remain unchanged
C. Decrease markedly
✓
D. Become identical to proteins

📝 Explanation

Correct: Oxygen interferes with the formation and stability of organic molecules. A: Opposite of experimental reasoning. B: Oxygen changes reaction conditions. D: Amino acids do not spontaneously become proteins. Concept: Application of experimental evidence.

📖 Additional Information

  • Increase significantly
  • Remain unchanged
  • Decrease markedly
  • Become identical to proteins

Correct: Oxygen interferes with the formation and stability of organic molecules. A: Opposite of experimental reasoning. B: Oxygen changes reaction conditions. D: Amino acids do not spontaneously become proteins. Concept: Application of experimental evidence.

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