Question

Which among the following are prokaryotes?
A)Bacteria and yeast
B)Blue-green algae and Bacteria
C)Yeast and Amoeba
D)Bacteria and Amoeba

Answer 1

Hint: The first one is actually types of bacteria known as Cyanobacteria. They generally look green and sometimes bluish when their scums are dying. The second one is microscopic, single-celled organisms that are present in different environments. They are inhabitants of soil, the ocean, and can also present inside the human gut.

Complete answer:
-A cell that doesn’t have a true nucleus or membrane-bound organelles are called prokaryotic cells. These include bacteria and archaea. Except for them, all other forms of life are eukaryotes.
-organisms with the prokaryotic cells are huge in numbers i.e. they are abundant and make up the earth biomass
Blue-green algae - they are prokaryotic cells and commonly lack membrane-bound organelles and nuclei. The algae are known as blue-green algae because of the presence of phycocyanin pigment.
-they are the group of prokaryotic autotrophic microorganisms which generally comprise photosynthetic pigments such as chlorophyll and phycocyanin.
Bacteria - it has genetic material that is not stored within a membrane-bound nucleus. Its genetic material is stored in a nucleoside that generally floats in the cytoplasm of the cell. Hence, they are known as prokaryotes.

Additional Information: Yeast - Yeasts are single-celled organisms, but the cellular organization found in them that are quite similar to those possessed by higher, multi-cellular organisms – that depicts they have a nucleus and are therefore eukaryotes, as described above.
Amoeba- Amoebae are mainly eukaryotes most often with a single cell. Amoebae cells possess certain characteristic features like those of other eukaryotes. There is a central cellular compartment called the nucleus that packs the DNA of amoeba. Also, the cell membrane encloses the cytoplasm and cellular contents of the amoeba
So, the correct answer is,” Blue-green algae and Bacteria”.

 Prokaryotic Bacteria

Note: -Prokaryotic cells are originally the single-celled organism where there is a disorganized nucleus without
Where the nuclear membrane, non membrane-bounded organelles, and intracellular compartments are absent.
-The blue-green algae and bacteria are characterized as prokaryotes due to the presence of an incipient nucleus that does not have nucleolus and the nuclear membrane and also the dissociation of DNA with histone protein.
 The ribosome of these organisms is 70s type, which is composed of two subunits 50s and 30s.