Question : Honey that has a high concentration of sugar does not decay because
Option 1: bacteria cannot survive in an active state as it is deprived of oxygen
Option 2: it contains natural antioxidant that prevents bacterial attack
Option 3: bacteria cannot survive in an active state in a solution of high osmotic strength as water is drawn out
Option 4: None of these
Correct Answer: bacteria cannot survive in an active state in a solution of high osmotic strength as water is drawn out
Solution : The answer is bacteria cannot survive in an active state in a solution of high osmotic strength as water is drawn out.
Because of its low water content and strong acidity, honey with a high sugar concentration does not degrade or spoil. These conditions create an inhospitable environment for the growth of most microorganisms that would normally cause decay in other foods, such as bacteria and moulds because they cannot survive in a solution of high osmotic strength as water is drawn out of their cells through the process of osmosis.
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Question : Why do pickles last longer?
Option 1: Only beneficial bacteria can grow in the pickle.
Option 2: The water content of the pickle protects the pickle from spoilage.
Option 3: Pickle is prepared in a vacuum so that no harmful bacteria can grow on it.
Option 4: Bacterial and fungal cells get plasmolysed in high salt concentrations of pickle.
Question : Heart attack occurs due to :
Option 1: Bacterial attack on the heart
Option 2: Stopping of heart beat
Option 3: Lack of blood supply to the heart itself
Option 4: Impairment of heart's working due to unkhown reasons
Question : Which one of the following is the ideal food for newborn babies ?
Option 1: Water
Option 2: Sugar
Option 3: Honey
Option 4: Milk
Question : Pneumonia is a bacterial disease caused by a type of bacteria called _______.
Option 1: Bacilli
Option 2: Cocci
Option 3: Spirilla
Option 4: Vibrio
Question : Which is used as an Air pollution indication?
Option 1: Algae
Option 2: Fungi
Option 3: Bacteria
Option 4: Lichens
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