An Experiment Similar to the Miller-Urey Experiment Was More Recently

question 98

Multiple Choice

An experiment similar to the Miller-Urey Experiment was more recently done by NASA using an icy mixture of water,methanol,ammonia and carbon monoxide.The mixture was exposed to ultraviolet radiation.The results of this experiment were that no amino acids or DNA were formed,but complex organic molecules were observed.The purpose of this experiment was to determine whether:

• A) DNA could form from amino acids.
• B) DNA could form from ultraviolet radiation.
• C) ultraviolet radiation could create amino acids.
• D) amino acids could form in the harsh vacuum of outer space.
• E) amino acids cold form from water, methanol, ammonia and carbon monoxide.

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Definitions:

Methanogens

Microorganisms that produce methane as a metabolic byproduct in anoxic conditions.

Chemoautotrophs

Organisms that obtain energy by the oxidation of inorganic substances, such as hydrogen sulfide or ammonia, and use this energy to convert carbon dioxide into organic matter.

Bacterial Exotoxins

Potentially harmful proteins secreted by bacteria into their external environment, capable of causing various diseases in host organisms.