NCERT Solutions: Class 8 Science Chapter 2 Microorganisms

Microorganisms and Their Roles

• The process of conversion of sugar into alcohol is called fermentation.
• The carrier of malaria-causing protozoan is the female Anopheles mosquito.
• Yeast fermentation causes bread or idli dough to rise.
• Penicillin is an antibiotic.
• Human beings are the most common carriers of communicable diseases.
• Microorganisms can be seen with the aid of a microscope.
• Microorganisms are classified into major groups based on their cell structure, namely: Bacteria, Virus, Fungi, and Protists.
• Viruses are not considered a major group of microorganisms in the context of cell structure classification.
• Microorganisms play a crucial role in fixing atmospheric nitrogen in the soil.
• Streptomycin is not a commonly known antibiotic.
• The main function of antibiotics is to inhibit the growth of microorganisms or kill them.
• Antibiotics are typically made from fungi and bacteria because they produce certain chemicals that can inhibit or kill other microorganisms.