class 7 science chapter 1 mcq
25 When you see the structure of the cell through compound microscope, which of the following is unseen
1. cell wall
2. cytoplasm
3. nucleus
4. electron
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24 This disease also affects human along with cattle
1. foot & mouth disease
2. anthrax
3. malaria
4. viral disease
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23 In pasteurisation milk is heated up to
1. 50C
2. 60C
3. 70C
4. 80C
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22 Invention of pasteurisation
1. edward jenner
2. louis pasteur
3. flemming
4. ronald ross
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21 Vector for 'Plasmodium' is
1. female anopheles mosquito
2. male anopheles mosquito
3. female culex mosquito
4. male culex mosquito
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20 The micro organism "plasmodium" causes
1. t.b
2. typhoid
3. malaria
4. polio
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19 Disease causing micro organisms are
1. vectors
2. pathgen
3. microbes
4. all
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18 The milkmaids who developed cowpox develop immunity to
1. typhoid
2. smallpox
3. t.b
4. all
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17 Small pox vaccine is invented by
1. edward jenner
2. ronald ross
3. louis pasteur
4. albert sabin
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16 Micro organisms present in root nodules of leguminous plants
1. rhizobium
2. bacillus
3. azatobactor
4. nostoc
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