28 Questions
Which two domains of life are recognized in the phylogenetic tree of life?
Prokaryotes and eukaryotes
Which domain of life shares many metabolic traits with bacteria?
Archaea
How many major phyla of Archaea have been identified so far?
Seven
Which domain of life has distinctive modified bases in their tRNA molecules?
Archaea
What is the structure of RNA pol II in archaea similar to?
Eukaryotes
Why is it difficult to study archaea?
All of the above
Which of the following is a key trait found only in archaea?
Ether-linked membrane lipids
What is the structure of archaea usually like?
0.5 to 5 μm in diameter
What is the composition of the archaeal cell membrane?
Isoprene chains
Which energy source do archaeal flagella use?
ATP
Which organisms are responsible for methane production in our atmosphere?
Archaea
What is the function of bacteriorhodopsin in haloarchaea?
Pumping out H+
What is a unique feature of archaeal genome structure?
Presence of introns
Which of the following is true about archaeal gene regulation?
Archaeal gene regulation is a combination of bacterial and eukaryotic mechanisms
What is a distinguishing feature of tRNA molecules in archaea?
They contain modified bases
What is a challenge in studying archaea?
Lack of genetic tools
What is a unique characteristic of archaeal cell division?
It is a combination of bacterial and eukaryotic cell division mechanisms
Why don't archaea typically cause disease?
They have a different cell structure compared to pathogens
Which domain of life do archaea share many metabolic traits with?
Bacteria
Which domain of life has distinctive modified bases in their tRNA molecules?
Archaea
Which domain of life has a transcription machinery and gene structure similar to that of eukaryotes?
Archaea
Which domain of life employs distinct machineries for cell division?
Archaea
Which domain of life has members with different chromosome copy numbers and replication control systems?
Archaea
Which of the following is NOT a characteristic of archaeal gene regulation?
RNA pol II structure is similar to that of eukaryotes
Which of the following is a challenge in studying archaea?
Members of distinct phyla have different chromosome copy numbers
Which domain of life shares many metabolic traits with bacteria?
Archaea
What is a unique feature of archaeal genome structure?
Distinct chromosome copy numbers
Which domain of life do archaea share many metabolic traits with?
Bacteria
Test your knowledge on the cell surface structures of Archaea, including the unique "grappling hooks" and the structure of Archaella. Learn about their similarities and differences compared to bacterial and eukaryotic flagella and their energy source.
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