Q1: What hypothesis did Miller and Urey test in their experiment?
A1: The hypothesis that conditions on the early Earth could have permitted the synthesis of organic molecules from inorganic ingredients.
Q2: Why was the appearance of protobionts surrounded by membranes likely a key step in the origin of life?
A2: In contrast to random mingling of molecules in an open solution, segregation of molecular systems by membranes could concentrate organic molecules, and electrical charge gradients across the membrane could assist biochemical reactions.
Q3: What is ribozyme?
A3: A ribozyme is an RNA molecule that catalyzes a chemical reaction
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