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
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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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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 |
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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 |
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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 |
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The Miller experiment was significant because it:
| 1. | Demonstrated the survival of the fittest. |
| 2. | Showed that life could arise from non-life under the right conditions. |
| 3. | Proved that organic molecules could be synthesized from inorganic compounds under conditions that might have existed on the early Earth. |
| 4. | Explained the mechanism of natural selection. |
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Who observed presence of amino acids in the experimental set-up to prove abiogenic molecular evolution of life?
1. Oparin
2. Haldane
3. Miller
4. Redi
Subtopic: Urey & Miller Experiment |
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A chemical experiment that simulated the conditions thought at the time to be present on the early Earth and tested the chemical origin of life under those conditions was performed by:
| 1. | Georges Cuvier | 2. | Francesco Redi |
| 3. | Alfred Russell Wallace | 4. | Stanley Miller |
Subtopic: Urey & Miller Experiment |
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Which of the following will not be true regarding the Miller experiment?
| 1. | He created electric discharge in a closed flask. |
| 2. | The closed flask contained methane, hydrogen, ammonia, and water vapor. |
| 3. | The experiment was carried out at 800 degrees Celsius. |
| 4. | He observed formation of large amount of nucleic acids. |
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The Miller-Urey experiment, designed to simulate conditions of primitive Earth, demonstrated that organic compounds including amino acids could be synthesised from inorganic molecules when:
| 1. | Oxygen-rich atmosphere was subjected to electrical discharge |
| 2. | Reducing atmospheric gases were exposed to energy sources like lightning |
| 3. | Carbon dioxide and nitrogen were mixed at high temperatures only |
| 4. | Photosynthetic organisms were present in primitive oceans |
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