Archaea and Bacteria are separated into two different DOMAINS because of the differences in DNALocomation
Question
Archaea and Bacteria are separated into two different DOMAINS because of the differences in DNALocomation
Solution
Archaea and Bacteria are separated into two different domains primarily because of the differences in their genetic sequences and the structure of their cellular machinery, not locomotion.
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DNA: The DNA sequences of Archaea and Bacteria show significant differences. The genetic code of Archaea is more similar to Eukaryotes (organisms whose cells have a nucleus enclosed within membranes) than it is to Bacteria.
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Cellular Machinery: The machinery used by these two domains for reading and expressing their DNA (transcription and translation) also differs. For example, the ribosomes of Archaea are more similar to those of Eukaryotes than to Bacteria.
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Cell Membrane: The composition of their cell membranes is also different. Bacteria have a peptidoglycan cell wall, while Archaea have a variety of cell walls but none of them contain peptidoglycan.
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Lipids: The lipids in the cell membranes of Archaea are unique and different
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1. Organisms with prokaryotic cells are separated into two domains, Bacteria and Archaea.target 1 of 82. Protistsare the most diverse and widespread prokaryotes.target 2 of 83. Most of the prokaryotes known as archaealive in extreme environments, such as salty lakes.target 3 of 84. All organisms with eukaryotic cells are grouped in domain Eukarya.target 4 of 85. Bacteriaare a diverse collection of mostly single-celled eukaryotes, which are sorted into several kingdoms to reflect their evolutionary relationships.target 5 of 86. Kingdom Plantae consists of multicellular eukaryotes that produce their food by photosynthesis.target 6 of 87. Kingdom Fungi includes eukaryotic organisms that mostly decompose organic wastes and absorb nutrients into their cells.target 7 of 88. Kingdom Animalia consists of multicellular eukaryotes that obtain their food by ingesting (eating) other organisms.
A) Archaea and Eukarya are more closely related to each other than bacteria.B) R.H. Whittaker placed unicellular eukaryotic organisms in the Kingdom Monera.C) Carl Woese replaced kingdom Monera with two kingdoms bacteria and archaea.D) 16S rRNA is used as marker in identification of microbes.Identify the incorrect statements.
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