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Is cyanobacteria a prokaryote or eukaryote?
Cyanobacteria are prokaryotes. They lack a membrane-bound nucleus and other organelles commonly found in eukaryotic cells.
Given that prokaryotes lack membrane-bound organelles why do cyanobacteria which are prokaryotes possess membrane-bound thylakoids?
Cyanobacteria were formerly known as blue-green algae which are photosynthetic. Thylakoids in the cyanobacteria are not separate organelles as we see in eukaryotic cell (eg:chloroplast). In fact the chloroplasts of eukaryotic cells were originated in a endosymbiotic event where cyanobacteria was taken up by the cell. Please read about enodsymbiosis.
Do prokaryotes lack mitochondria?
No they do not have.They do not have any membrane bound organell.
Microscopic single celled organism that has no defined memebrane bound nucleus would fit into which 2 kingdoms?
The microscopic single-celled organism without a defined membrane-bound nucleus would fit into the kingdoms Bacteria and Archaea. These organisms are known as prokaryotes and lack a true nucleus, making them distinct from eukaryotic organisms found in the kingdom Protista, Fungi, Plantae, and Animalia.
Do eubacteria have mitochondria?
No, eubacteria do not have mitochondria. Mitochondria are organelles found in eukaryotic cells that are responsible for producing energy through cellular respiration. Eubacteria are prokaryotic organisms that lack membrane-bound organelles.
