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IB Biology HL 2.1.4 Evidence for Origin of Carbon Compounds

Practise IB Biology HL 2.1.4 by evaluating alternative prebiotic environments and the limits of Miller–Urey evidence for organic synthesis.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Evaluate hydrothermal, atmospheric, clay and extraterrestrial settings as possible synthesis environments.
  • Interpret Miller–Urey findings and distinguish organic products from proof of complete life formation.

A2.1.4—Evidence for origin of carbon compounds question 1

[Maximum number: 1]

The Miller-Urey experiment carried out in 1952 tested the hypothesis of the chemical origin of life. What were the key findings?

A

Living cells could be produced from a mixture of chemicals.

B

Complex organic molecules could form under simulated primordial conditions.

C

Life could spontaneously emerge without external influence.

D

DNA and RNA could self-replicate in a prebiotic environment.

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