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Q. No.Which of the following was NOT a constituent of experiments conducted by Miller in 1953?
1. C6H6
2. H2
3. NH3
4. Water vapours
1. C6H6
2. H2
3. NH3
4. Water vapours
Subtopic: Urey & Miller Experiment |
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Who demonstrated through careful experimentation that life arises only from pre-existing life, thereby dismissing the theory of spontaneous generation?
1. Anton van Leeuwenhoek
2. Robert Koch
3. Louis Pasteur
4. Alexander Fleming
1. Anton van Leeuwenhoek
2. Robert Koch
3. Louis Pasteur
4. Alexander Fleming
Subtopic: Origin of Life |
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Stanley Miller had put the Oparin-Haldane theory to test in 1953 by creating in the laboratory, the probable conditions on the primitive earth. In the experiment, simple amino acids were synthesized from which of the following mixtures, as observed after eighteen days?
1.
2.
3.
4.
Subtopic: Urey & Miller Experiment |
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Who proposed that the first forms of life could have come from pre-existing non-living organic molecules like RNA and proteins?
| 1. | Oparin and Haldane | 2. | Aristotle |
| 3. | Father Suarez | 4. | Darwin |
Subtopic: Origin of Life: Chemical Evolution: 1 |
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In the Miller-Urey experiment, which gases were used to simulate the atmosphere of early Earth?
| 1. | Nitrogen, oxygen, water vapor, and carbon dioxide |
| 2. | Methane, ammonia, hydrogen, and water vapor |
| 3. | Carbon dioxide, oxygen, nitrogen, and ammonia |
| 4. | Oxygen, methane, water vapor, and nitrogen |
Subtopic: Urey & Miller Experiment |
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In 1953, S.L. Miller created conditions similar to those suggested by Oparin and Haldane in a laboratory where he created electric discharge in a closed flask containing:
| 1. | CH4, H2, NH3 and water vapour at 800°C |
| 2. | CH4, H2, HCN and hydrogen sulphide at 400°C |
| 3. | CO2, H2, NH3 and water vapour at 800°C |
| 4. | CO2, H2, HCN and hydrogen sulphide at 400°C |
Subtopic: Urey & Miller Experiment |
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The experiment of Miller and Urey proved that
| 1. | life came from other planets |
| 2. | simple organic molecules could form in reducing atmosphere |
| 3. | DNA was first formed |
| 4. | ozone shield was necessary for life |
Subtopic: Urey & Miller Experiment |
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For primary abiogenesis, Oparin opined that the primeval Earth atmosphere lacked:
1. Hydrogen
2. Free oxygen
3. Methane
4. Ammonia
1. Hydrogen
2. Free oxygen
3. Methane
4. Ammonia
Subtopic: Cosmic Evolution | Origin of Life: Chemical Evolution: 1 | Origin of Life: Chemical Evolution: 2 |
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Which of the following statements is incorrect?
| 1. | Life processes are consequences of reactions that occur in an organism. |
| 2. | Living organisms are made of inorganic and organic compounds. |
| 3. | Life comes from pre-existing life. |
| 4. | Genes are not responsible for the stability or changeability of species. |
Subtopic: Other Theories of Origin of Life |
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Subtopic: Cosmic Evolution | Other Theories of Origin of Life |
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