Chapter 8 Useful and Harmful Microbes
- Define antibiotics ? Antibiotics are the organic compounds which are also produced by the microorganisms which inhibits the growth or kills the other disease cau... 1
- What is fermentation? The process in which complex organic compounds are decomposed into simpler one in the presence of enzyme is called as fermentation. Curd is... 1
- What are broad spectrum antibiotics? The broad spectrum antibiotics are the antibiotics existing over the wide range which kills the gram positive and gram negative bacteria in... 2
- Why it is necessary to safely store pathogens of disease against which vaccines are to be protected? Vaccines are the dead or weakened organisms which increase the immunity against the disease. As these are the dead and weakened organisms th... 1
- Are the antibiotics given to human and animals the same? Why? The diseases causing to animals and humans are different so the microorganisms which cause the disease will also be different in animals and... 1
- How do antibiotics cause disease? Microorganisms are surviving due to their certain biochemical pathway. Such as in respiration and enzyme synthesis. Antibiotics binds with t... 1
- How is a vaccine produced? Vaccine are nothing but the some dead or weakened organisms which helps the body to fight against the various kinds of diseases. Hence, to p... 2
- Which vaccines are given to infants? Why? The various kinds of vaccines are given to the infants between 0-12 months. Some of them are BCG vaccination, Hepatitis B, Oral Polio vaccin... 1
- Match the pairs. ‘A’ group ‘B’ group 1. Rhizobium a. Food poisoning 2. Clostridium b. Nitrogen fixation 1) Rhizobium: Nitrogen fixation 2) Clostridium: Food poisoning 3) Penicillium: Production of antibiotics 4) Yeast: Bakery products 1
- Write down the modes of infection and the preventive measures against the fungal diseases. Fungal infections are due to the fungi found in soil, water, plants, animals, air and also on the people. Fungal infections are occurred due... 2
- Why are naphthalene balls kept with cloths to be put away. Naphthalene balls are kept with cloths because when they kept in cloths sublime slowly and after sublimation there will be no residue left.... 1
- Foam accumulates on the surface of ‘dal’ kept for long time in summer. Answer: Because microbes (bacteria and fungi) grow in the dal and ferment it, producing gases such as carbon dioxide, which form foam. Cooke... 1
- Identify the odd word out and say why it is the odd one. a) Pneumonia, diphtheria, chicken pox, cholera. Odd word: Chicken pox Because chicken pox is a viral disease while all the other are bacteri... 2
- Write the names of the microbes found in the following food materials. Yoghurt- Lactobacillus Bread -Saccharomyces Root nodules of Leguminous plants - Rhizobium Idli - lactobacillus Dosa - Lactobacillus Spoiled... 1
- Complete the statement using the proper option from those given below. (Mycotoxins, budding, Rhizobium) a) Yeast reproduces asexually by the budding b) Toxins of fungal origin are called mycotoxins. c) Leguminous plants can produce more protein... 1