Introduction of Yeast
Yeast is found in all places, but in places where the amount of sugar is high, it is found in large quantities, such as in sugarcane juice, fruits and milk, etc. It is a saprophytic fungus.
Introduction of Bacteria
Bacteria are prokaryotic. It is unicellular. It is the most abundant of all micro-organisms. It is the simplest of all living beings and can be found almost everywhere.
We can understand the difference between yeast and bacteria by the following points -
Difference Between Yeast and Bacteria
- Yeasts often grow on organic materials that are high in sugar. Whereas bacteria are present almost everywhere.
- Some species of yeast cause disease. Whereas bacteria cause many types of diseases by entering the body of animals and humans.
- Yeasts are large in size (1-5um, in width and 5 to 30um, in length). Whereas bacteria are very small, and microscopic organisms.
- Yeasts are usually round or oval. Whereas bacteria are of different shapes, e.g., spherical, spores are spiral or comma shaped.
- Yeast lacks chlorophyll. Most of its species are saprophytic and some are also found in the form of parasitic. Whereas bacteria are parasitic, motile or symbiotic. Many of its species are autotrophic due to the presence of the bacterium, while some are also chemosynthetic.
- Yeasts are unicellular, eukaryotic organisms. Nucleolus is found in their nucleus and mitochondria, centrosomes and other cells are found in the cytoplasm. Whereas bacteria are prokaryotic, unicellular organisms. Its nucleus lacks nuclear membrane and nucleolus and centrosomes, mitochondria and other organelles are not found in the cytoplasm. Only ribosomes are found.
- Asexual reproduction in yeast occurs by budding, binary fission and nonmotile spores. Whereas in bacteria asexual reproduction takes place by endospores, binary fission, conidia and zoospores.
- Sexual reproduction in yeast takes place by conjugation. The zygote formed after fusion acts as an ascus and forms an ascospore. Whereas, according to the current theory of bacteria, there are three types of sexual reproduction in bacteria - conjugation, transformation and transduction.
- The cell wall of yeast is made up of chitin or fungal cellulose. There is a lack of cellulose. Whereas carbohydrate, fat, mucus and chitin, etc., are found in the cell wall of bacteria. In some bacteria the cell wall is made of cellulose.
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