Table of Contents
What are the 4 groups of microbes?
The major groups of microorganisms—namely bacteria, archaea, fungi (yeasts and molds), algae, protozoa, and viruses—are summarized below.
Where can bacteria be found?
Bacteria are found in every habitat on Earth: soil, rock, oceans and even arctic snow. Some live in or on other organisms including plants and animals including humans. There are approximately 10 times as many bacterial cells as human cells in the human body.
How are bacteria archaea fungi protozoa algae and viruses distinguished on the basis of structure?
Algae – eukaryotic, photosynthetic, unicellular, cellulose cell wall. Viruses – acellular, simple, one type of nucleic acid, must have host to survive. How are bacteria, archaea, fungi, protozoa, algae, and viruses distinguished on the basis of cellular structure? all living things are composed of cells.
Where are archaea found?
Habitats of the archaea Archaea are microorganisms that define the limits of life on Earth. They were originally discovered and described in extreme environments, such as hydrothermal vents and terrestrial hot springs. They were also found in a diverse range of highly saline, acidic, and anaerobic environments.
What do bacteria and fungi have in common?
Similarities Between Bacteria and Fungi Both bacteria and fungi are heterotrophs. Both bacteria and fungi can be saprophytes or parasites. Both bacteria and fungi are composed of a cell wall, which is made up of polysaccharides. Both bacteria and fungi require warmth, moisture, and nutrients for growth.
Do archaea have ribosomes?
Ribosome structure is very well conserved in all cells. In Archaea, the small ribosomal subunits have certain structural features (‘bill’ and ‘lobes’) also seen in Eukarya but not in Bacteria. Archaeal ribosomes are composed of 30S and 50S subunits that join to make a 70S particle.
What is the difference between a virus and a prion?
Prion lacks DNA or RNA while viruses possess nucleic acids either DNA or RNA. Furthermore, virus causes diseases to animals, plants, bacteria, protists, archaea, etc. while prion causes diseases only to human and animals.
What kind of diseases can be caused by Prion?
Due to this infection, some holes appear inside the brain that can only be treated by incineration. Some of the diseases caused by prion are Mad Cow Disease, Scrapie in sheep and goat, chronic wasting disease in deer and elk, kuru and Creutz-Jakob disease.
A. Prions are believed to cause Creutzfeldt-Jakob disease (CJD). B. Prions lack a nucleus but must form DNA/RNA at some time in order to replicate. C. Prions are misshapen proteins that cause other proteins to change shape.
How are nucleic acids protected in a virus?
Virus is a nanometer size infectious particle composing a protein coat and nucleic acids. Thus, viral nucleic acids can be either DNA or RNA. Nucleic acids can be single or double-stranded. Furthermore, they can be linear or circular or segmented. Structurally, nucleic acids remain protected within the protein capsid.