EVOLUTION
THE ORIGIN OF LIFE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Life on early Earth required material from space
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Cells survived in the primitive atmosphere
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Amino acids and other small organic molecules could be produced from inorganic molecules
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Simple cells can be produced in a laboratory
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Detailed explanation-1: -Miller, Urey, and others showed that simple inorganic molecules could combine to form the organic building blocks required for life as we know it. Once formed, these building blocks could have come together to form polymers such as proteins or RNA.
Detailed explanation-2: -In his May 15, 1953, article in Science, “A Production of Amino Acids Under Possible Primitive Earth Conditions, ” Miller identified just five amino acids: aspartic acid, glycine, alpha-amino-butyric acid, and two versions of alanine. Aspartic acid, glycine and alanine are common constituents of natural proteins.
Detailed explanation-3: -One week later Miller and Urey found that simple organic molecules, including amino acids (the building blocks of proteins), had formed under the simulated conditions of early Earth.
Detailed explanation-4: -The influential Miller-Urey experiment showed that with just water, ammonia, hydrogen and methane – and electric sparks to mimic lightning – you could form several of the protein precursors necessary for life on Earth. Stanley Miller and Harold Urey’s aim was to recreate the chemical conditions of early Earth.
Detailed explanation-5: -The study shows that Miller–Urey experiments produce RNA nucleobases in discharges and laser-driven plasma impact simulations carried out in a simple prototype of reducing atmosphere containing ammonia and carbon monoxide.