The Miller-Urey experiment attempted to simulate early Earth conditions to test the chemical origin of life. Which of the following gaseous components was NOT included in their experimental setup, despite being potentially present in the early atmosphere?
Methane ()
Ammonia ()
Water vapor ()
Oxygen ()
Related Questions
Which of the following is a critical argument against the theory of panspermia related to the origin of life on Earth?
Meteorites have been found to contain organic molecules.
Life on Earth shares a common genetic code.
Microbial life has been found in extreme environments on Earth.
The harsh conditions of space, including radiation and extreme temperatures, would likely destroy any known life forms during interstellar travel.
The Miller-Urey experiment attempted to simulate early Earth conditions to test the chemical origin of life. Which of the following gaseous components was NOT included in their experimental setup, despite being potentially present in the early atmosphere?
Methane ()
Ammonia ()
Water vapor ()
Oxygen ()
Protocells are considered a key step in the origin of life. Which of the following is NOT a characteristic typically associated with protocells?
Membrane-bound compartments
Simple metabolic activity
Ability to undergo fission
Developed DNA replication mechanisms
The 'hot dilute soup' proposed by Haldane and Oparin as a crucial stage in the origin of life faced a major challenge. What was this primary obstacle?
The absence of a continuous source of energy.
The presence of an oxidizing atmosphere.
The lack of a mechanism to concentrate the organic molecules to facilitate polymerization.
The instability of amino acids at high temperatures.
The RNA world hypothesis proposes that RNA, not DNA, was the primary genetic material in early life. Which characteristic of RNA makes it a more plausible candidate for this role compared to DNA?
Double-stranded structure
Higher stability
Catalytic activity
Presence of thymine
Which of the following best describes the significance of coacervates in the context of the origin of life?
They are fossilized evidence of the earliest life forms on Earth.
They prove that RNA was the primary genetic material in early life.
They demonstrate how membrane-bound compartments, crucial for cellular life, could have arisen spontaneously from organic molecules.
They explain the mechanism by which the first self-replicating molecules were formed.
