AP BIOLOGY

EVOLUTION

THE ORIGIN OF LIFE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The experiment of Oparin and Miller (1953)
A
is the most consistent experiment to proof the appearance of life on Earth from inorganic matter.
B
was part of the experiment to demonstrate the structure of DNA (1953)
C
has never been repeated.
D
it transformed complex organic matter to simpler one by cooling and applying UV radiation.
Explanation: 

Detailed explanation-1: -The Miller-Urey experiment provided the first evidence that organic molecules needed for life could be formed from inorganic components. Some scientists support the RNA world hypothesis, which suggests that the first life was self-replicating RNA.

Detailed explanation-2: -In 7 to 8 day he saw that some methane and other molecules changed into organic compounds like protein and carbon. So, this experiment proves that organic compounds, which are required for cellular life, were made spontaneously from those gases under the conditions believed to be present on the early earth.

Detailed explanation-3: -February 1953 In 1953, scientist Stanley Miller performed an experiment that may explain what occurred on primitive Earth billions of years ago. He sent an electrical charge through a flask of a chemical solution of methane, ammonia, hydrogen and water. This created organic compounds including amino acids.

Detailed explanation-4: -The experiment was a success in that amino acids, the building blocks of life, were produced during the simulation. The finding was so significant that it kick-started an entirely new field of study: Prebiotic Chemistry.

There is 1 question to complete.