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Class VIII >> Science >> Microorganisms >> A1

Q1	Name the instrument that is used to observe the microorganisms.
A	Telescope
B	Stethoscope
C	Microscope
D	Kaleidoscope

Q2	Insects that transmit disease-causing microbes to a healthy person are called __________.
A	Pathogens
B	Antibodies
C	Virus
D	Carriers

Q3	The ability of one's body to resist infection is known as __________.
A	Antigens
B	Immunisation
C	Immunity
D	Fermentation

Q4	Microorganisms are __________.
A	Single-celled
B	Multicellular
C	Either Single-celled or Multicellular
D	Neither Single-celled nor Multicellular

Q5	Organisms that are visible only with the help of a microscope are called __________.
A	Pathogens
B	Carriers
C	Microorganisms
D	Bacteria

Q6	Process in which vaccine is given to improve the immunity of the body against specific disease is called __________.
A	Fermentation
B	Vaccination
C	Pasteurisation
D	Preservation

Q7	What is the process of breaking down nitrogen compounds into ammonia called?
A	Nitrification
B	Nitrogen Cycle
C	Ammonification
D	Fermentation

Q8	Name the method of preservation in which foodstuff is heated to a high temperature and then cooled rapidly.
A	Fermentation
B	Pasteurization
C	Decomposition
D	Food Preservation

Q9	Which of the following is a medium through which harmful microorganisms enter the body of a healthy person?
A	Air
B	Water
C	Food
D	All of the Above

Q10	Nitrogen and Oxygen combine in the atmosphere during lightning to form __________.
A	Hydrogen
B	Nitrogen Oxide
C	Carbon Dioxide
D	Nitrates

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