How are bacteria classified on the basis of nutrition?
The nutritional requirements for bacteria can be grouped according to the carbon source and the energy source. Some types of bacteria must consume pre-formed organic molecules to obtain energy, while other bacteria can generate their own energy from inorganic sources.
What are the different types of nutrition found in bacteria?
The nutrition in bacteria is mainly autotrophic and heterotrophic. Phototrophic bacteria contain various pigments to synthesize their own food, while heterotrophic bacteria are dependent on other organisms for food. Parasitic bacteria fulfill their nutrition needs or requirements from the host cell.
What are the 3 different types of nutritional bacteria?
Nutritional Types of Bacteria
- Autotrophs and Heterotrophs. Some bacteria obtain energy by consuming organicmolecules.
- Bacteria That Eat Inorganic Compounds.
- Bacteria That Consume Organic Compounds.
- Bacteria That Use Light as Food.
- Bacteria That Eat Chemicals.
What are the classifications of bacteria?
Bacteria are classified into five groups according to their basic shapes: spherical (cocci), rod (bacilli), spiral (spirilla), comma (vibrios) or corkscrew (spirochaetes). They can exist as single cells, in pairs, chains or clusters. Bacteria are found in every habitat on Earth: soil, rock, oceans and even arctic snow.
What are the criteria for classification of bacteria?
Indeed, bacteria are classified on the basis of many characteristics. Cell shape, nature of multicell aggregates, motility, formation of spores, and reaction to the Gram stain are important.
How are bacteria classified based from their pH?
Bacteria are generally neutrophiles. They grow best at neutral pH close to 7.0. Acidophiles grow optimally at a pH near 3.0. Alkaliphiles are organisms that grow optimally between a pH of 8 and 10.5.
What types of bacteria are autotrophic?
The two different types of autotrophic bacteria are:
- Photoautotrophs – or photosynthetic. They derive energy from sunlight.
- Chemoautotrophs – or chemosynthetic. They use chemical energy to prepare their food.
What are the two different types of autotrophic bacteria?
Classification of Bacteria on the basis of Nutrition. Nutrition is substances used in biosynthesis and energy production and therefore are required for all living things. Bacteria, like all living cells, require energy and nutrients to build proteins and structural membranes and drive biochemical processes.
What are the characteristics of a microorganism?
Characteristics of the organism that classifies its kingdom: cell type, body form, cell wall composi- tion, mode of nutrition, nervous system, and lo- comotion. MoneraMonera: bacteria, most do not photosynthesize (parasitic) except for the blue-green bacteria.
What makes Gram positive bacteria different from Gram negative bacteria?
Gram positive bacteria stain blue-purple and Gram negative bacteria stain red. The difference between the two groups is believed to be due to a much larger peptidoglycan (cell wall) in Gram positives. As a result the iodine and crystal violet precipitate in the MID 1
How is antisera used to classify bacterial species?
Serologic systems: Selected antisera can be used to classify different bacterial species. This may be based on either carbohydrate or protein antigens from the bacterial cell wall or the capsular polysaccharide. (Group A streptococcal M proteins or O and H polysaccharide antigens of salmonella).