184820
Which compound has very important role in prebiotic evolution?
1 \(\mathrm{SO}_{2}\)
2 \(\mathrm{NO}\)
3 \(\mathrm{CH}_{4}\)
4 \(\mathrm{SO}_{3}\)
Explanation:
\(\mathrm{CH}_{4}\) (Methane) has very important role in prebiotic evolution. Miller showed the presence of four gases in his experiment. One of them is methane that is \(\mathrm{CH}_{4}\). This gas results in the formation of amino acids such as alanine, glycine that show evolution. From a mixture of methane, hydrogen, ammonia and water vapour. As in primitive atmosphere hydrogen served as a reducing agent while methane provided hydrocarbon skeleton for synthesis of organic compounds. The absence of methane prevented synthesis of these monomer's in a glass chamber. Water served as a medium for chemical synthesis of organic compounds in the glass chamber. Oxygen and therefore oxides \(\left(\mathrm{SO}_{2}, \mathrm{NO}, \mathrm{SO}_{3}\right.\), etc. \()\) were absent in primitive atmosphere.
The chemical elements most prominent in building the structure of the molecules of life are carbon (C) Hydrogen \((\mathrm{H})\), oxygen \((\mathrm{O})\), Nitrogen \((\mathrm{N})\) and also sulphur \((\mathrm{S})\) and phosphorus \((\mathrm{P})\) too. The elements combine in a vast number of molecules involved in life processes. The elements makeup the bulk of living organism. In addition to these elements a number of metal atoms play essential supporting roles in producing enzymes, contributing to communication pathway and enabling specific processes in the body. So, these elements \((\mathrm{C}, \mathrm{H}, \mathrm{O}\), \(\mathrm{N}\) and \(\mathrm{S}, \mathrm{P}\) ) are called elements of life.
AMU-1998
Evolution
184823
Discovery of fossils of cyanobacteria indicates that life originated sometime
1 Prior to 4600 million years ago
2 Between 4600 and 3600 million years ago
3 More than 3600 million years ago
4 During some other period.
Explanation:
Discovery of fossils of cyanobacteria indicates that life originated sometime more than 3600 million years ago. The Cyanobacteria have an extensive fossils, in fact, are Cyanobacteria from Archaean rocks of Western Australia, dated 3.5 billion years old.
184820
Which compound has very important role in prebiotic evolution?
1 \(\mathrm{SO}_{2}\)
2 \(\mathrm{NO}\)
3 \(\mathrm{CH}_{4}\)
4 \(\mathrm{SO}_{3}\)
Explanation:
\(\mathrm{CH}_{4}\) (Methane) has very important role in prebiotic evolution. Miller showed the presence of four gases in his experiment. One of them is methane that is \(\mathrm{CH}_{4}\). This gas results in the formation of amino acids such as alanine, glycine that show evolution. From a mixture of methane, hydrogen, ammonia and water vapour. As in primitive atmosphere hydrogen served as a reducing agent while methane provided hydrocarbon skeleton for synthesis of organic compounds. The absence of methane prevented synthesis of these monomer's in a glass chamber. Water served as a medium for chemical synthesis of organic compounds in the glass chamber. Oxygen and therefore oxides \(\left(\mathrm{SO}_{2}, \mathrm{NO}, \mathrm{SO}_{3}\right.\), etc. \()\) were absent in primitive atmosphere.
The chemical elements most prominent in building the structure of the molecules of life are carbon (C) Hydrogen \((\mathrm{H})\), oxygen \((\mathrm{O})\), Nitrogen \((\mathrm{N})\) and also sulphur \((\mathrm{S})\) and phosphorus \((\mathrm{P})\) too. The elements combine in a vast number of molecules involved in life processes. The elements makeup the bulk of living organism. In addition to these elements a number of metal atoms play essential supporting roles in producing enzymes, contributing to communication pathway and enabling specific processes in the body. So, these elements \((\mathrm{C}, \mathrm{H}, \mathrm{O}\), \(\mathrm{N}\) and \(\mathrm{S}, \mathrm{P}\) ) are called elements of life.
AMU-1998
Evolution
184823
Discovery of fossils of cyanobacteria indicates that life originated sometime
1 Prior to 4600 million years ago
2 Between 4600 and 3600 million years ago
3 More than 3600 million years ago
4 During some other period.
Explanation:
Discovery of fossils of cyanobacteria indicates that life originated sometime more than 3600 million years ago. The Cyanobacteria have an extensive fossils, in fact, are Cyanobacteria from Archaean rocks of Western Australia, dated 3.5 billion years old.
184820
Which compound has very important role in prebiotic evolution?
1 \(\mathrm{SO}_{2}\)
2 \(\mathrm{NO}\)
3 \(\mathrm{CH}_{4}\)
4 \(\mathrm{SO}_{3}\)
Explanation:
\(\mathrm{CH}_{4}\) (Methane) has very important role in prebiotic evolution. Miller showed the presence of four gases in his experiment. One of them is methane that is \(\mathrm{CH}_{4}\). This gas results in the formation of amino acids such as alanine, glycine that show evolution. From a mixture of methane, hydrogen, ammonia and water vapour. As in primitive atmosphere hydrogen served as a reducing agent while methane provided hydrocarbon skeleton for synthesis of organic compounds. The absence of methane prevented synthesis of these monomer's in a glass chamber. Water served as a medium for chemical synthesis of organic compounds in the glass chamber. Oxygen and therefore oxides \(\left(\mathrm{SO}_{2}, \mathrm{NO}, \mathrm{SO}_{3}\right.\), etc. \()\) were absent in primitive atmosphere.
The chemical elements most prominent in building the structure of the molecules of life are carbon (C) Hydrogen \((\mathrm{H})\), oxygen \((\mathrm{O})\), Nitrogen \((\mathrm{N})\) and also sulphur \((\mathrm{S})\) and phosphorus \((\mathrm{P})\) too. The elements combine in a vast number of molecules involved in life processes. The elements makeup the bulk of living organism. In addition to these elements a number of metal atoms play essential supporting roles in producing enzymes, contributing to communication pathway and enabling specific processes in the body. So, these elements \((\mathrm{C}, \mathrm{H}, \mathrm{O}\), \(\mathrm{N}\) and \(\mathrm{S}, \mathrm{P}\) ) are called elements of life.
AMU-1998
Evolution
184823
Discovery of fossils of cyanobacteria indicates that life originated sometime
1 Prior to 4600 million years ago
2 Between 4600 and 3600 million years ago
3 More than 3600 million years ago
4 During some other period.
Explanation:
Discovery of fossils of cyanobacteria indicates that life originated sometime more than 3600 million years ago. The Cyanobacteria have an extensive fossils, in fact, are Cyanobacteria from Archaean rocks of Western Australia, dated 3.5 billion years old.
184820
Which compound has very important role in prebiotic evolution?
1 \(\mathrm{SO}_{2}\)
2 \(\mathrm{NO}\)
3 \(\mathrm{CH}_{4}\)
4 \(\mathrm{SO}_{3}\)
Explanation:
\(\mathrm{CH}_{4}\) (Methane) has very important role in prebiotic evolution. Miller showed the presence of four gases in his experiment. One of them is methane that is \(\mathrm{CH}_{4}\). This gas results in the formation of amino acids such as alanine, glycine that show evolution. From a mixture of methane, hydrogen, ammonia and water vapour. As in primitive atmosphere hydrogen served as a reducing agent while methane provided hydrocarbon skeleton for synthesis of organic compounds. The absence of methane prevented synthesis of these monomer's in a glass chamber. Water served as a medium for chemical synthesis of organic compounds in the glass chamber. Oxygen and therefore oxides \(\left(\mathrm{SO}_{2}, \mathrm{NO}, \mathrm{SO}_{3}\right.\), etc. \()\) were absent in primitive atmosphere.
The chemical elements most prominent in building the structure of the molecules of life are carbon (C) Hydrogen \((\mathrm{H})\), oxygen \((\mathrm{O})\), Nitrogen \((\mathrm{N})\) and also sulphur \((\mathrm{S})\) and phosphorus \((\mathrm{P})\) too. The elements combine in a vast number of molecules involved in life processes. The elements makeup the bulk of living organism. In addition to these elements a number of metal atoms play essential supporting roles in producing enzymes, contributing to communication pathway and enabling specific processes in the body. So, these elements \((\mathrm{C}, \mathrm{H}, \mathrm{O}\), \(\mathrm{N}\) and \(\mathrm{S}, \mathrm{P}\) ) are called elements of life.
AMU-1998
Evolution
184823
Discovery of fossils of cyanobacteria indicates that life originated sometime
1 Prior to 4600 million years ago
2 Between 4600 and 3600 million years ago
3 More than 3600 million years ago
4 During some other period.
Explanation:
Discovery of fossils of cyanobacteria indicates that life originated sometime more than 3600 million years ago. The Cyanobacteria have an extensive fossils, in fact, are Cyanobacteria from Archaean rocks of Western Australia, dated 3.5 billion years old.
