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28 Cards in this Set
- Front
- Back
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Gaseous mixture used by Miller for synthesis of amino acids through heat and electric discharge includes |
Methane, ammonia, hydrogen, and water vapours |
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Stanley L. Miller conducted experiments before 1953 on prebiotic earth environment using special apparatus. The primary suprising products were |
Amino acids |
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Life originated in an era known as |
Precambrian |
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The most accepted theory of origin of life was proposed by |
Oparin and Haldane |
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Miller and Urey created an atmosphere containing |
H2, CH4, NH3, and water vapour |
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'Life can originate from pre-existing life only' was proved by |
Louis Pasteur |
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Today earth's atmosphere is |
Oxidizing |
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Which theory about origin of life is most acceptable? |
Chemosynthetic origin of life |
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The proteins formed for the first time on Earth were formed |
Non-enzymatically |
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Which of the following gases were absent in a free form at the time of origin of life? |
O2 CH4, N2, and H2 are present |
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The atmosphere of primitive earth was converted from reducing to oxidizing atmosphere by the |
Photoautotrophs |
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Aggregation of molecules with/without membrane |
Coacervates |
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Life originated on earth approx ..... years ago |
3,600 million |
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The first photosynthetic organisms were |
Cyanobacteria |
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The outermost membrane of coacervate was formed of |
Fatty acids |
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The outermost membrane of coacervate was formed of |
Fatty acids |
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Oparin's theory about the origin of life is based upon |
Chemical evolution |
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The first organism to be found on a bare rock is |
Lichen |
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One of the early possible sources of energy was |
U.V. rays and lightning |
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Synthesis of biological compounds during origin of life occured with the help of energy from |
U.V radiation and lightning |
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The age of Big Bang is likely to be the order of |
10^10 years |
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Pasteur is famous for |
Germ theory of disease |
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Identify the correct sequence in which substances had appeared during the course of origin of life upon Earth |
Ammonia, amino acids, proteins, nucleic acids |
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Coacervate could multiply by |
Budding |
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A compound having very important role in prebiotic evolution is |
CH4 or Methane |
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Miller and Urey in their dielectric spark discharged experiment used CH4, NH3, and H2 in the ratio |
2:1:2 |
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According to chemical origin of life, sequence of origin of life is |
Amino acid -> Proteins -> Chlorophyll |
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On the primitive earth, polymers such as protein and nucleic acids in aqueous suspensions formed the spherical aggregates. These are called |
Eobionts |
