Microorganisms: Friend and Foe
| Description: Microorganisms: Friend and Foe | |
| Number of Questions: 29 | |
| Created by: Naresh Verma | |
| Tags: Science Class 8 Harmful Microorganism and Diseases Caused by them to Humans, in Plants and in Animals. Microorganisms: Friend and Foe Micro Organisms and their Classification. Friendly Microorganism and their Activities. |
Which of the following disease is not caused by a bacteria?
Which of the following diseases is not caused by a virus?
Which of the following disease is caused by a protozoa?
Which of the following statements is/are false? a. Microorganisms may be unicellular or multicellular. b. Viruses feed, move and respire on their own. c. Bacteria is useful in making food, nitrogen fixation and decomposition of waste organic matter.
Which of the following is a bacteria?
Which of the following is not a group into which microorganisms can be classified?
Which of the following is a protozoa?
Which of the following disease is caused by a fungi?
Which of the following microorganisms is used for making curd?
Which of the following statements is/are false? a. Algae do not have proper roots, stems and leaves. b. Chlamydomonas is a multicellular algae. c. The blue-green algae have the ability to fix nitrogen gas of the atmosphere.
Which of the following is a fungi?
Which of the following is /are the uses of microorganisms? a. Microorganisms are utilised in the making of curd and cake. b. Microorganisms are used in the production of antibiotics. c. Microorganisms are used in the production of alcohol, wine and vinegar.
Which of the following is not an antibiotic?
The fungi of ______________ is very small in size and can be only seen with the help of a microscope.
Match the following:
| a. Bacteria | 1. are a group of single-celled microorganisms which are classified as animals. |
| b. Viruses | 2. are very small, single-celled microorganisms which have cell walls but do not have organised nucleus and other structures. |
| c. Protozoa | 3. are the smallest microorganisms which can develop only inside the cells of the host organisms. |
Which of the following is a non-communicable disease?
Which of the following is present in the root nodules of leguminous plants. It helps in fixing atmospheric nitrogen and increases the fertility of the soil.
Which of the following diseases is not spread by a housefly?
Which of the following statements is/are false? a. Except yeast, all fungi are made up of fine threads called hyphae. b. Fungi needs moist and warm conditions to grow. c. Diatoms is an example of mould fungi.
Which of the following is used to make alcoholic drinks and industrial spirit?
Which of the following diseases is not preventable by vaccination?
Match the following:
| Human diseases | Mode of transmission |
| a. Measles | 1. Water |
| b. Typhoid | 2. Mosquitoe |
| c. Dengue | 3. Air |
Penicillin, the first antibiotic, was extracted from _____________.
Which of the following is a communicable disease?
Which of the following statements is/are false? a. Algae can turn alcohol into acetic acid. b. Yeast is used in the baking industry to make bread. c. Microorganisms clean up the atmosphere by decomposing the organic matter of dead plants, animals into harmless and simple substances.
Match the following:
| Human diseases | Method of spreading |
| a. Common cold | 1. taking infected food or water |
| b. Cholera | 2. sharing infected needles, injections or by sexual contact with the infected person |
| c. AIDS | 3. breathing air containing microorganisms |
Match the following:
| a. Pathogens | 1. are a large group of organisms, which do not have chlorophyll and do not photosynthesise. |
| b. Algae | 2. are the disease causing microorganisms. |
| c. Fungi | 3. is a large group of simple, plant-like organisms. |
Which of the following statements is/are false? a. Diseases caused by viruses cannot be treated with antibiotics. b. Viruses are bigger in size than bacteria. c. Amoebic dysentery is caused by a protozoa called Entamoeba.
Which of the following is an algae?