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Question
How many of the following statement(s) are correct ?
I. Stanley Miller created electric discharge in a closed flask containing CO2, H2, NH3 and water vapour at 200°C.
II. Haldane proposed the concept of a "primordial soup".
III. Water was not essential for the origin of life.
IV. The first non-cellular forms of life could reproduce and might have originated 3 billion years back.
How many of the following statement(s) are correct ?
I. Stanley Miller created electric discharge in a closed flask containing CO2, H2, NH3 and water vapour at 200°C.
II. Haldane proposed the concept of a "primordial soup".
III. Water was not essential for the origin of life.
IV. The first non-cellular forms of life could reproduce and might have originated 3 billion years back.
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Solution
The correct option is B Two
Scientists Oparin and Haldane proposed that life on earth could have originated from organic molecules (RNA, protein, etc.) which in turn were formed from the inorganic molecules. All these chemical reactions were occurring in the oceans. The primitive terrestrial ocean containing organic compounds that may have facilitated chemical evolution was called primordial soup by Haldane.
Based on the hypothesis by Oparin and Haldane, Stanley Miller conducted an experiment which provided evidence of chemical evolution.
He created primitive earth conditions in a laboratory. He took a closed flask containing gases like CH₄, H2, NH3 and water vapour at 800°C and created an electric discharge.
Water was essential for the origin of life. It is the universal solvent required for several reactions. After the origin of life, major parts of evolution have occurred in water only.
The first non-cellular forms of life were clusters of nucleoproteins (RNA, protein, polysaccharides, etc.). These were the first signs of life which originated about 3 billion years ago. They perhaps had the ability to reproduce.
Hence, statements II and IV are correct.
Scientists Oparin and Haldane proposed that life on earth could have originated from organic molecules (RNA, protein, etc.) which in turn were formed from the inorganic molecules. All these chemical reactions were occurring in the oceans. The primitive terrestrial ocean containing organic compounds that may have facilitated chemical evolution was called primordial soup by Haldane.
Based on the hypothesis by Oparin and Haldane, Stanley Miller conducted an experiment which provided evidence of chemical evolution.
He created primitive earth conditions in a laboratory. He took a closed flask containing gases like CH₄, H2, NH3 and water vapour at 800°C and created an electric discharge.
Water was essential for the origin of life. It is the universal solvent required for several reactions. After the origin of life, major parts of evolution have occurred in water only.
The first non-cellular forms of life were clusters of nucleoproteins (RNA, protein, polysaccharides, etc.). These were the first signs of life which originated about 3 billion years ago. They perhaps had the ability to reproduce.
Hence, statements II and IV are correct.
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