filmov
tv
Prokaryotic Metabolism | Prokaryotes: Bacteria and Archaea | Unit 5. Biological Diversity
Показать описание
Chapter: Prokaryotic Metabolism
Collection: Prokaryotes: Bacteria and Archaea
Unit 5. Biological Diversity
Book: Biology
Read the 'Prokaryotic Metabolism' chapter online at:
Check your comprehension by answering those online MCQ questions:
Prokaryotes are the most metabolically diverse organisms; they flourish in many different environments with various carbon energy and carbon sources, variable temperature, pH, pressure, and water availability. Nutrients required in large amounts are called macronutrients, whereas those required in trace amounts are called micronutrients or trace elements. Macronutrients include C, H, O, N, P, S, K, Mg, Ca, and Na. In addition to these macronutrients, prokaryotes require various metallic elements for growth and enzyme function. Prokaryotes use different sources of energy to assemble macromolecules from smaller molecules. Phototrophs obtain their energy from sunlight, whereas chemotrophs obtain energy from chemical compounds. Prokaryotes play roles in the carbon and nitrogen cycles. Carbon is returned to the atmosphere by the respiration of animals and other chemoorganotrophic organisms. Consumers use organic compounds generated by producers and release carbon dioxide into the atmosphere. The most important contributor of carbon dioxide to the atmosphere is microbial decomposition of dead material. Nitrogen is recycled in nature from organic compounds to ammonia, ammonium ions, nitrite, nitrate, and nitrogen gas. Gaseous nitrogen is transformed into ammonia through nitrogen fixation. Ammonia is anaerobically catabolized by some prokaryotes, yielding N2 as the final product. Nitrification is the conversion of ammonium into nitrite. Nitrification in soils is carried out by bacteria. Denitrification is also performed by bacteria and transforms nitrate from soils into gaseous nitrogen compounds, such as N2 O, NO, and N2.
00:00 Prokaryotic Metabolism
00:47 Needs of prokaryotes
01:18 Macronutrients
03:52 Micronutrients
04:25 The ways in which prokaryotes obtain energy
05:03 The ways in which prokaryotes obtain carbon
06:08 Role of prokaryotes in ecosystems
06:28 Prokaryotes and the carbon cycle
08:54 Prokaryotes and the nitrogen cycle
10:53 Section summary
©Copyright 2022 Jobilize LLC all rights reserved.
Collection: Prokaryotes: Bacteria and Archaea
Unit 5. Biological Diversity
Book: Biology
Read the 'Prokaryotic Metabolism' chapter online at:
Check your comprehension by answering those online MCQ questions:
Prokaryotes are the most metabolically diverse organisms; they flourish in many different environments with various carbon energy and carbon sources, variable temperature, pH, pressure, and water availability. Nutrients required in large amounts are called macronutrients, whereas those required in trace amounts are called micronutrients or trace elements. Macronutrients include C, H, O, N, P, S, K, Mg, Ca, and Na. In addition to these macronutrients, prokaryotes require various metallic elements for growth and enzyme function. Prokaryotes use different sources of energy to assemble macromolecules from smaller molecules. Phototrophs obtain their energy from sunlight, whereas chemotrophs obtain energy from chemical compounds. Prokaryotes play roles in the carbon and nitrogen cycles. Carbon is returned to the atmosphere by the respiration of animals and other chemoorganotrophic organisms. Consumers use organic compounds generated by producers and release carbon dioxide into the atmosphere. The most important contributor of carbon dioxide to the atmosphere is microbial decomposition of dead material. Nitrogen is recycled in nature from organic compounds to ammonia, ammonium ions, nitrite, nitrate, and nitrogen gas. Gaseous nitrogen is transformed into ammonia through nitrogen fixation. Ammonia is anaerobically catabolized by some prokaryotes, yielding N2 as the final product. Nitrification is the conversion of ammonium into nitrite. Nitrification in soils is carried out by bacteria. Denitrification is also performed by bacteria and transforms nitrate from soils into gaseous nitrogen compounds, such as N2 O, NO, and N2.
00:00 Prokaryotic Metabolism
00:47 Needs of prokaryotes
01:18 Macronutrients
03:52 Micronutrients
04:25 The ways in which prokaryotes obtain energy
05:03 The ways in which prokaryotes obtain carbon
06:08 Role of prokaryotes in ecosystems
06:28 Prokaryotes and the carbon cycle
08:54 Prokaryotes and the nitrogen cycle
10:53 Section summary
©Copyright 2022 Jobilize LLC all rights reserved.
0:06:59
0:13:16
0:08:20
1:04:37
0:00:41
0:07:31
0:03:54
0:10:01
0:35:16
0:10:16
0:42:55
0:40:41
0:08:34
0:06:43
0:25:38
0:02:29
0:05:38
0:05:50
0:01:46
0:06:48
3:27:39
0:03:13
1:02:20
0:12:56