Class 8th Science Chapter – 2 Microorganisms: Friend and Foe
| Textbook | NCERT |
| Class | 8th |
| Subject | Science |
| Chapter | 2nd |
| Chapter Name | Microorganisms: Friend and Foe |
| Category | Class 8th Science |
| Medium | English |
| Source | Last Doubt |
| Class 8th Science Chapter – 2 Microorganisms: Friend and Foe MCQ With Answer What do bacteria eat?, What are 2 good bacteria?, Are bacteria good or bad?, What are three good bacteria?, What is a germ?, How are bacteria named?, What is a short note of bacteria?, What is bacteria shape?, What bacteria has 3 basic shapes?, Where is bacteria found?, What is the size of a bacteria?, What is bacteria made of?, Which bacteria was first discovered?, What bacteria is in urine?, What are the 4 types of infections?, Where did bacteria grow?, Is bacteria bigger or small?, Do bacteria have DNA?, Which is the smallest bacteria?, Who is father of bacteria?, Who found virus?, How old is bacteria? |
Class 8th Science Chapter – 2 Microorganisms: Friend and Foe
Chapter – 2
Microorganisms: Friend and Foe
MCQ
| (1) The microorganisms smaller than bacteria are ? A. Viruses B. Protozoan C. Fungi D. Algae Answer – (A) Viruses |
| (2) The algae commonly used as a fertiliser are ? A. staphylococcus B. diatoms C. blue-green algae D. none of these Answer – (C) blue-green algae |
| (3) Who discovered the vaccine for smallpox ? A. Louis Pasteur B. Alexander Fleming C. Joseph Lister D. Edward Jenner Answer – (D) Edward Jenner |
| (4) The microorganisms that cause diseases in human beings, plants and animals are called ? A. carriers B. mosquitoes C. pathogens D. antibodies Answer – (C) pathogens |
| (5) Microorganisms are ? A. unicellular B. multicellular C. both A. and B. D. none of these Answer – (C) both A. and B. |
| (6) Scientist who discovered fermentation is ? A. Alexander Fleming B. Louis Pasteur C. John Mendel D. Edward Jenner Answer – (B) Louis Pasteur |
| (7) Amoeba belongs to ? A. algae B. fungi C. protozoa D. viruses Answer – (C) protozoa |
| (8) Mushroom belongs to the group of ? A. algae B. viruses C. fungi D. none of these Answer – (C) fungi |
| (9) Penicillin was discovered by ? A. Edward Jenner B. Louis Pasteur C. Alexander Fleming D. Robert Koch Answer – (C) Alexander Fleming |
| (10) Antibiotics are effective against ? A. bacteria B. algae C. viruses D. all of the above Answer – (A) bacteria |
| (11) Simple, plant-like microorganisms are called ? A. algae B. bacteria C. both A. and B. D. protozoa Answer – (A) algae |
| (12) Medium that transmits pathogens from an infected person to a healthy one is called ? A. fungi B. germs C. carrier D. none of these Answer – (C) carrier |
| (13) Medicine that kills or stops the growth of harmful disease-causing microbes is known as ? A. antibiotic B. antibody C. antigen D. vaccine Answer – (A) antibiotic |
| (14) The process in which sugar in the food is transformed into alcohol and carbon dioxide by using microorganisms is known as ? A. transformation B. beverage C. fermentation D. respiration Answer – (C) fermentation |
| (15) The fungus that is commonly used in bakery and beverage industries is ? A. Penicillium B. Yeast C. Agaricus D. Rhizopus Answer – (B) Yeast |
| (16) Giardia is listed under the category of ? A. fungi B. protozoa C. bacteria D. algae Answer – (B) protozoa |
| (17) Substance used to produce immunity against diseases in the living body is called ? A. immune B. vaccine C. antibody D. antigen Answer – (B) vaccine |
| (18) How much nitrogen is present in the atmosphere ? A. 78% B. 88% C. 68% D. 58% Answer – (A) 78% |
| (19) Malaria is caused by which type of microbe ? A. Bacteria B. Fungi C. Algae D. Protozoa Answer – (D) Protozoa |
| (20) Common cold is caused by which type of microbe ? A. Bacteria B. Virus C. Algae D. Fungi Answer – (B) Virus |
| (21) Which of the following diseases is caused by a fungus ? A. Cholera B. Common cold C. Ringworm D. Dengue Answer – (C) Ringworm |
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