Microorganisms Friend and Foe MCQ Questions Class 8 Science Chapter 2
NCERT MCQ Questions for Class 8 Science Chapter 2 Microorganisms Friend and Foe. Microorganisms Friend and Foe MCQ Questions with Answers from Class 8 Science.
Microorganisms Friend and Foe MCQ Questions Class 8 Science Chapter 2
Microorganisms Friend and Foe Multiple Choice Questions with Answers Class 8 Science Chapter 2 PDF is available.
1.) There are some living organisms around us which are not visible to the unatded eye , are called _____ ?
a) Viruses
b) Microbes
Ans. b) Microbes
2) The disease like _____ is caused by viruses ?
a) Polio
b) Malaria
c) Typhoid
Ans. a) Polio
3.) Malaria is caused by _____ ?
a) Protozoa
b) Bacteria
c) Virus
Ans. a) Protozoa
4.) Tuberculosis is caused by _____ ?
a) Protozoa
b) Bacteria
c) Virus
Ans. b) Bacteria
5.) In agriculture _____ are used to increase soil fertility by fixing nitrogen ?
a) Protozoa
b) Viruses
c) Bacteria
Ans. c) Bacteria
6.) _____ is used for making breads , pastries and cakes ?
a) Yeast
b) Bacteria
c) Protozoa
Ans. a) Yeast
7.) Milk is turned into curd by _____ ?
a) Yeast
b) Bacteria
c) Protozoa
Ans. b) Bacteria
8.) ____ is used for commercial production of alcohol and wine ?
a) Algae
b) Bacteria
c) Yeast
Ans. c) Yeast
9.) The process of conversion of sugar into alcohol is known as _____ ?
a) Preservation
b) Fermentation
Ans. b) Fermentation
10.) The medicines that are used to kill or stop the growth of the disease-causing microbes , are called _____ ?
a) Antibiotics
b) Antibodies
Ans. a) Antibiotics
11.) When a disease-carrying microbe enters our body , body produces _____ to fight the invader ?
a) Antibiotics
b) Antibodies
Ans. b) Antibodies
12.) The disease-causing microorganisms are called _____ ?
a) Pathogens
b) Bacteria
c) Yeast
Ans. a) Pathogens
13.) Microbial diseases that can spread from an infected person to a healthy person through air , water , food or physical contact are called _____ ?
a) Food poisoning
b) Communicable diseases
Ans. b) Communicable diseases
14.) Female _____ mosquito carries the parasite of malaria ?
a) Anopheles
b) Aedes
Ans. a) Anopheles
15.) Female _____ mosquito acts as carrier of dengue virus ?
a) Anopheles
b) Aedes
Ans. b) Aedes
16.) Typhoid can spread from an infected person to a healthy person through _____ ?
a) Air
b) Food
c) Water
Ans. c) Water
In case you are missed :- Previous Chapter MCQ Questions
17.) Cholera can spread from an infected person to a healthy person through _____ ?
a) Air
b) Food
c) Contact
Ans. b) Food
18.) Chicken pox can spread from an infected person to a healthy person through _____ ?
a) Contact
b) Water
c) Food
Ans. a) Contact
19.) Polio can spread from an infected person to a healthy person through _____ ?
a) Contact
b) Air
c) Food
Ans. b) Air
20.) ____ is a dangerous human and cattle disease caused by a bacterium ?
a) Malaria
b) Polio
c) Anthrax
Ans. c) Anthrax
21.) Foot and mouth disease of cattle is caused by a _____ ?
a) Bacteria
b) Virus
c) Protozoa
Ans. b) Virus
22.) Rust of wheat is a plant disease which is caused by _____ microbe ?
a) Bacteria
b) Virus
c) Fungi
Ans. c) Fungi
23.) Cirus canker is a plant disease which is caused by _____ microbe ?
a) Bacteria
b) Virus
c) Fungi
Ans. a) Bacteria
24.) Yellow vein mosaic of bhindi is a plant disease which is caused by _____ microbe ?
a) Bacteria
b) Virus
c) Fungi
Ans. b) Virus
25.) Rust of wheat c an spread through _____ ?
a) Seeds
b) Insect
Ans. a) Seeds
26.) _____ is a preservative ?
a) Air
b) Salt
c) Water
Ans. b) Salt
27.) Raw mangoes are preserved by _____ ?
a) Salt
b) Sugar
c) Oil
Ans. a) Salt
28.) Jams are preserved by ____ ?
a) Salt
b) Sugar
c) Oil
Ans. b) Sugar
29.) Spoilage of pickles is preserved by _____ ?
a) Salt
b) Sugar
c) Oil
Ans. c) Oil
30.) The process of heating , chilling and storing milk to prevent the growth of microbes , is called _____ ?
a) Pasteurisation
b) Preservation
Ans. a) Pasteurisation
31.) Our atmosphere has ____ % nitrogen gas ?
a) 88%
b) 98%
c) 78 %
Ans. c) 78%
32.) _____ is used for the synthesis of plant proteins and other compounds ?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
Ans. b) Nitrogen
In case you are missed :- Next Chapter MCQ Questions