In this article we will discuss about nutrition and growth in bacteria. Nutrition in Bacteria: Bacteria are devoid of chlorophyll and they perform heterotrophic mode of nutrition. However, there is a small group of bacteria which are autotrophic: 1. Autotrophic Bacteria: They can synthesise carbohydrate .food from CO2 like that of chlorophyll containing plants. They are of two types: Photosynthetic [...]
In this article we will discuss about the characters of different groups of prokaryotes. Domain: Archaea: The important characters of Domain Archaea (Gr. archaios, ancient) are: Important Characters of Archaea: 1. Members of the Domain Archaea i.e., Archebacteria can live in different habitats like. i. Extreme acidic and hot (above 100°C) environment, ii. Extreme saline condition, and iii. In anaerobic [...]
In this article we will discuss about the four main phases of growth curve in bacteria. The phases are: 1. Lag Phase 2. Log Phase or Exponential Phase 3. Stationary Phase 4. Decline Phase. 1. Lag Phase: After inoculation into the sterile nutrient medium, the bacterium first undergoes a period of acclimatisation. At that time, necessary enzymes and intermediate [...]