The following points highlight the three main mediums of Identification of Bacterial Growth. the mediums are: 1. Growth on Nutrient Agar 2. Blood Agar 3. MacConKey’s Agar. Medium # 1. Growth on Nutrient Agar (Table 7.2): Steps to be adopted: 1. Observe and record the morphology of colony and pigment production in nutrient agar plate or tube. To identify a [...]
The upcoming discussion will update you about the difference between Gram-Positive and Gram-Negative Bacteria. Difference # Gram-Positive Bacteria: 1. Cell wall thick (150-200 A thick), straight, single layered and outer membrane is absent in gram-positive bacteria. 2. Cell wall of gram-positive bacteria contains less % of lipids (2-4%). 3. Striking simplicity of amino acids i.e., walls have relatively few amino [...]
The following points highlight the four major nutritional types of bacteria. The types are: 1. Photoautotrophs 2. Photoheterotrophs 3. Chemoautotrophs 4. Chemoheterotrophs. Type # 1. Photoautotrophs: These bacteria capture the energy of sun light and transform it into the chemical energy. In this process CO2 is reduced to carbohydrates. The hydrogen donor is water and the process produce free oxygen. [...]