AP BIOLOGY

EVOLUTION

THE ORIGIN OF LIFE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Assume a group of scientists has managed to set up an experiment simulating the conditions of early Earth that resulted in a cell with DNA using RNA to produce proteins from amino acids as modern cells do. What conclusion could they draw from this experiment?
A
It is possible for a cell similar to a modern cell to form under the conditions of the experiment.
B
Modern cells developed from inorganic compounds in the conditions that existed on early Earth.
C
The conditions of their experiment exactly replicated the conditions found on early Earth.
D
The way modern cells function is the only way a cell could be constructed and survive.
Explanation: 

Detailed explanation-1: -RNA can direct the creation of proteins and perform other essential functions of life that DNA can’t do. RNA’s versatility is one reason that scientists think this polymer came first, with DNA evolving later as a better way to store genetic information for the long haul.

Detailed explanation-2: -Miller-Urey experiment Their 1950s experiment produced a number of organic molecules, including amino acids, that are made and used by living cells to grow and replicate. Miller and Urey used an experimental setup to recreate what environmental conditions were believed to be like on early Earth.

Detailed explanation-3: -The Miller-Urey experiment In 1953 American chemists Harold C. Urey and Stanley Miller tested the Oparin-Haldane theory and successfully produced organic molecules from some of the inorganic components thought to have been present on prebiotic Earth.

Detailed explanation-4: -The Miller-Urey experiment, conducted by chemists Stanley Miller and Harold Urey in 1953, is the classic experiment on the origin of life. It established that the early Earth atmosphere, as they pictured it, was capable of producing amino acids, the building blocks of life, from inorganic substances.

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