1. Two bacteria found to be very useful in genetic engineering experiment as

1. 1. Nitrosomonas and klebsiella

   
   
   

   2. Escherichia and Agrobacterium

   
   
   

   3. Nitrobacter and Azoobacter

   
   
   

   4. Rhizobium and Diplococcus

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

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2. Microorganism include

1. 1. Bacteria & Virus

   
   
   

   2. Bacteria, Virus, Microalgae and Fungi

   
   
   

   3. Bacteria, Virus Microalgae, Fungi and Protozoa

   
   
   

   4. All animals & Plants

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

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3. Bacteria cannot survive in a highly salted pickle because

1. 1. Bacteria get plasmolysed and are consequently killed

   
   
   

   2. Salt inhibits reproduction

   
   
   

   3. The pickel does not contain nutrient necessary for bacteria to survive

   
   
   

   4. Bacteria do not get enough light for photosynthisis

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

   N/A

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4. Refrigeration is a process in which

1. 1. Bacteria are destroyed

   
   
   

   2. Growth of bacteria reduced

   
   
   

   3. Bacteria become inactive

   
   
   

   4. Cytoplasm of bacteria contract

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

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5. Viruses are made up of

1. 1. Protein & lipids

   
   
   

   2. Nucleic acid & protein

   
   
   

   3. Lipids & Carbohydrate

   
   
   

   4. Carbohydrate & Nucleic acid

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

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