which bacteria causes citrus canker.
  • Lactobacillus
  • Aspergillus
  • Paramecium
  • Xanthomonas
Food preservation is done by addition of
  • acids
  • water
  • microbes
  • salt
Ameoba is a type of
  • unicellular plant
  • unicellular animal
  • multicellular animal
  • multicellular plant
Oscillatoria is an example of
  • Blue Green algae
  • Brown algae
  • Green algae
  • Golder brown algae
Who invented Penicillin?
  • Louis Pasteur
  • Robert Koch
  • Edward Jenner
  • Alexander Fleming
Match the column
class8-science-chapter-2-mcq.png
  • p -> ii, q -> iii, r -> iv , s ->i
  • p -> iv, q -> i, r -> ii , s ->iii
  • p -> ii, q -> iii, r -> i , s ->iv
  • p -> ii, q -> i, r -> iv , s ->iii
The disease caused by a protozoan and spread by an insect is
  • dengue
  • malaria
  • polio
  • measles
__________________ is a bacterium that sours milk and is used to makes curd from milk
  • Lactobacillus
  • Aspergillus
  • Paramecium
  • None of these
Which of the following is incorrect about Virus
  • Vaccine is used to protect us from Virus. Vaccines consist of dead and weakened microbes and it helps the body in producing antibodies against the virus and protecting human body
  • Virus are on the borderline of living and non- living.
  • typhoid is caused by Virus
  • Viruses can reproduce only inside the bodies of other organisms, which mean they need a host
Which of the following reproduces only inside a host cell?
  • Bacteria
  • Amoeba
  • Virus
  • Fungus.
Who discovered Fermentation?
  • Louis Pasteur
  • Robert Koch
  • Edward Jenner
  • Alexander Fleming
Pasteurization of Milk generally occurs at
  • 62.8°C for 30 min
  • 60.8°C for 30 min
  • 8 to 61 °C for 60 min
  • 8 to 62 °C for 60 min
Mushroom belongs to
  • Virus
  • Bacteria
  • Fungi
  • Pathogens
Which of the following causes plague?
  • Yersinia pestis
  • stolonic hyphae
  • Acetabulaia
  • Salmonella hyphae
Bacteria  were discovered by
  • Koch
  • J Lister
  • L Pasteur
  • Leeuwenhoek
A disease in human beings is not caused by virus is _______.
  • Polio
  • Chicken Pox
  • Influenza
  • typhoid
Virus is discovered by _____
  • L Pasteur
  • Ivanowski
  • Koch
  • Leeuwenhoek
Protein coat of Virus is called
  • Capsid
  • Peplos
  • Envelop
  • Nucleoid
Paramecium belongs which group
  • Protozoa
  • Algae
  • Fungi
  • Bacteria
Leprosy is because of
  • Monocystis
  • TMV
  • Salmonella
  • Mycobacterium leprae
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