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Class 8 Science
Microorganisms: Friend And Foe
Quiz 1
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like polio and chicken pox are caused by _______
0%
Bacteria
0%
Fungi
0%
Virus
0%
Worms
Explanation
Virus
Some medicines obtained from micro-organisms are applied to kill or stop the growth of disease-causing microorganisms. Such medicines are called ______.
0%
Antibodies
0%
Antibiotics
0%
Antiseptics
0%
All of the above
Explanation
Antibiotics
A common preservative used in jam and pickles is
0%
Sodium benzoate
0%
Nitric acid
0%
Sodium Chloride
0%
Copper Sulphate
Explanation
Sodium benzoate
Rhizobium found in root nodules of leguminous roots is an
0%
Atmospheric Carbon fixer
0%
Atmospheric Oxygen fixer
0%
Atmospheric Nitrogen fixer
0%
All of the above
Explanation
Atmospheric Nitrogen fixer
Lactobacillus is commonly found in
0%
Cake
0%
Curd
0%
Bread
0%
All of the above
Explanation
Curd
The process of conversion of sugar into alcohol by yeast is called
0%
Fermentation
0%
Pasteurisation
0%
Alcoholism
0%
All of the above
Explanation
Fermentation
The pores in the bread is due to gas bubbles of
0%
Oxygen
0%
Nitrogen di oxide
0%
Nitrogen
0%
Carbon di oxide
Explanation
Carbon di oxide
Deliberately injecting weak microbes into a healthy body and producing antibodies to fight against strong microbes is called _______
0%
Medication
0%
Antibiotics
0%
Vaccination
0%
All of the above
Explanation
Vaccination
The microbe for Malaria is carried by
0%
Male Anopheles mosquito
0%
Female Anopheles Mosquito
0%
Male Aedes mosquito
0%
Female Aedes mosquito
Explanation
Female Anopheles Mosquito
Alcohol is produced with the help of
0%
sodium chloride
0%
yeast
0%
nitrogen
0%
carbon dioxide
Explanation
yeast
Which of the following drug is an antipyretic?
0%
Insulin
0%
Alcohol
0%
Streptomycin
0%
Paracetamol
Explanation
Paracetamol
What helps in the rise of bread or dosa dough?
0%
Heat
0%
Grinding
0%
Growth of yeast cells
0%
Low pressure
Explanation
Growth of yeast cells
The status of algae in the aquatic food chain is
0%
consumers
0%
producers
0%
host
0%
small in size
Explanation
producers
The rod shaped bacteria are called
0%
Bacillus
0%
Coccus
0%
Vibrio
0%
Spirillum
Explanation
Bacillus
Bacteria present in root nodules of pea
0%
Coli
0%
Plasmodium
0%
Rhizobium
0%
Penicillin
Explanation
Rhizobium
The microorganism which contains chlorophyll
0%
Virus
0%
Fungus
0%
Algae
0%
All
Explanation
Algae
The disease caused by protozoa is
0%
tuberculosis
0%
polio
0%
typhoid
0%
malaria
Explanation
malaria
Which cannot fix atmospheric nitrogen in the soil?
0%
Rhizobium
0%
Clostridium
0%
Azotobacter
0%
Penicillin
Explanation
Penicillin
The disease caused by fungi is
0%
measles
0%
chicken pox
0%
polio
0%
ringworm
Explanation
ringworm
Which bacteria helps in settling of curd?
0%
Rhizobium
0%
Lactobacillus
0%
Vibriocholarae
0%
Bacillus
Explanation
Lactobacillus
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