CBSE Class 8 Science Microorganisms Friend or Foe MCQs

Refer to CBSE Class 8 Science Microorganisms Friend or Foe MCQs provided below. CBSE Class 8 Science MCQs with answers available in Pdf for free download. The MCQ Questions for Class 8 Science with answers have been prepared as per the latest syllabus, CBSE books and examination pattern suggested in Class 8 by CBSE, NCERT and KVS. Multiple Choice Questions for Chapter 2 Microorganisms Friend or Foe are an important part of exams for Class 8 Science and if practiced properly can help you to get higher marks. Refer to more Chapter-wise MCQs for CBSE Class 8 Science and also download more latest study material for all subjects

MCQ for Class 8 Science Chapter 2 Microorganisms Friend or Foe

Class 8 Science students should refer to the following multiple-choice questions with answers for Chapter 2 Microorganisms Friend or Foe in Class 8. These MCQ questions with answers for Class 8 Science will come in exams and help you to score good marks

Chapter 2 Microorganisms Friend or Foe MCQ Questions Class 8 Science with Answers

 Chapter 2

Microorganisms: Friend or Foe

 

Question. Diseases like polio and chicken pox are caused by _______ 

a) Bacteria

b) Fungi

c) Virus

d) Worms

Answer: C

 

Question. Examples of Multicellular Microorganism are 

a) Algae, Bacteria

b) Bacteria and Fungi

c) Bacteria and Viruses

d) Algae and Fungi

Answer: D

 

Question. Some medicines obtained from micro-organisms are applied to kill or stop the growth of disease-causing microorganisms. Such medicines are called ______.

a) Antibodies

b) Antibiotics

c) Antiseptics

d) All of the above

Answer: B

 

Question. A common preservative used in jam and pickles is

a) Sodium benzoate

b) Nitric acid

c) Sodium Chloride

d) Copper Sulphate

Answer: A

 

Question. Rhizobium found in root nodules of leguminous roots is an

a) Atmospheric Carbon fixer

b) Atmospheric Oxygen fixer

c) Atmospheric Nitrogen fixer

d) All of the above

Answer: C

 

Question. Lactobacillus is commonly found in

a) Cake

b) Curd

c) Bread

d) All of the above

Answer: B

 

Question. The process of conversion of sugar into alcohol by yeast is called

a) Fermentation

b) Pasteurisation

c) Alcoholism

d) All of the above

Answer: A

 

Question. . The pores in the bread is due to gas bubbles of

a) Oxygen

b) Nitrogen di oxide

c) Nitrogen

d) Carbon di oxide

Answer: D

 

Question.  Deliberately injecting weak microbes into a healthy body and producing antibodies to fight against strong microbes is called _______

a) Medication

b) Antibiotics

c) Vaccination

d) All of the above

Answer: C

 

Question. The microbe for Malaria is carried by

a) Male Anopheles mosquito

b) Female Anopheles Mosquito

c) Male Aedes mosquito

d) Female Aedes mosquito 

Answer: C

 

Question: Microorganisms are

a) Multi-cellular

b) Unicellular

c) Unicellular and multi-cellular

d) None of the options

Answer: A

 

Question: Penicillium is a

a) Fungus

b) Algae

c) Bacteria

d) Yeast

Answer: A

 

Question: Malaria Is caused by

a) Protozoa

b) Virus

c) Algae

d) Bacteria

Answer: A

 

Question: Rhizobium becteria

a) Help in nitrogen fixation

b) Help in digestion

c) Cause diseases

d) All of these

Answer: B

 

Question: Scientist who discovered fermentation is

a) Louis pasteur

b) Alexander fleming

c) John mendal

d) Edward jenner

Answer: A

 

Question: Amoeba belongs to

a) Protozoa

b) Algae

c) Fungi

d) Virus

Answer: A

 

Question: Mushroom belongs to

a) Fungi

b) Algae

c) Virus

d) None of the options

Answer: C

 

Question: Amount of nitrogen in the atmosohere is

a) 0.78

b) 0.58

c) 0.68

d) 0.88

Answer: A

 

Question: Vaccine for small pox is discorvered by

a) Edward jenner

b) Louis pasteur

c) Alexander fleming

d) John mendal

Answer: A

 

Question: Spyrogyra is

a) A fungi

b) An algae

c) A protozoa

d) A bacteria

Answer: A

 

Question. In Pasteurisation the milk is heated to about:
(a) 100°C
(b) 50°C
(c) 70°C
(d) 110°C

Answer : C

Question. Scientist who discovered fermentation is
(a) Alexander Fleming
(b) Louis Pasteur
(c) John Mendal
(d) Edward Jenne

Answer : B

Question. What helps in the rise of bread or dosa dough?
(a) Heat
(b) Grinding
(c) Growth of yeast cells
(d) Low pressure

Answer : C

Question. Yeast is not used in the preparation of :
(a) bread
(b) alcohol
(c) dhokla
(d) antibiotic

Answer : D

Question. Which of the following enzymes is secreted by bacteria that can digest cellulose?
(a) Amylase
(b) Cellulase
(c) Lipase
(d) Protease

Answer : B

Question. Examples of Multicellular Microorganism are
(a) Algae, Bacteria
(b) Bacteria and Fungi
(c) Bacteria and Viruses
(d) Algae and Fungi

Answer : D

Question. Virus reproduce:
(a) only outside the cells of the host organisms
(b) only inside the cells of the host organisms
(c) both inside and outside the cells of the host organisms
(d) none of these

Answer : B

Question. A plant disease called citrus canker is caused by a _________ .
(a) Virus
(b) Protozoa
(c) Bacteria
(d) Fungi

Answer : C

Question. What process takes place when yeast is added to grape juice and left for a week?
(a) Decomposition
(b) Fermentation
(c) Distillation
(d) Oxidation

Answer : B

Question. Malaria is spread by:
(a) plasmodium
(b) female anapheles mosquito
(c) male anapheles mosquito
(d) none of these

Answer : B

Chapter 01 Crop Production and Management
CBSE Class 8 Science Crop Production and Management MCQs
Chapter 02 Microorganisms Friend or Foe
CBSE Class 8 Science Microorganisms Friend or Foe MCQs
Chapter 03 Synthetic Fibres and Plastics
CBSE Class 8 Science Synthetic Fibre and Plastics MCQs
Chapter 04 Materials Metals and Non Metals
CBSE Class 8 Science Materials Metals and Non Metals MCQs
Chapter 05 Coal and Petroleum
CBSE Class 8 Science Coal and Petroleum MCQs
Chapter 06 Combustion and Flame
CBSE Class 8 Science Combustion and Flame MCQs
Chapter 07 Conservation of Plants and Animals
CBSE Class 8 Science Conservation of Plants and Animals MCQs
Chapter 08 Cell Structure and Functions
CBSE Class 8 Science Cell Structure and Functions MCQs
Chapter 09 Reproduction in Animals
CBSE Class 8 Science Reproduction in Animals MCQs
Chapter 10 Reaching the Age of Adolescence
CBSE Class 8 Science Reaching The Age of Adolescence MCQs
Chapter 11 Force and Pressure
CBSE Class 8 Science Force and Pressure MCQs
Chapter 14 Chemical Effects of Electric Current
CBSE Class 8 Science Chemical Effect of Electric Current MCQs
Chapter 15 Some Natural Phenomena
CBSE Class 8 Science Some Natural Phenomena MCQs
Chapter 17 Stars and The Solar System
CBSE Class 8 Science Stars and Solar System MCQs
Chapter 18 Pollution of Air and Water
CBSE Class 8 Science Pollution of Air and Water MCQs

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