Advertisements
Advertisements
प्रश्न
Give Reasons for the following.
Salt and sugar are used in preserving food.
Advertisements
उत्तर
Salt and sugar increase the concentration of food, destroying bacteria by plasmolysis.
APPEARS IN
संबंधित प्रश्न
Differentiate between the following:
Plasmolysis and deplasmolysis
Give reason for the following:
Potato cubes, when placed in water, become firm and increase in size.
Choose the correct answer:
Plasmolysis will occur when the cell is placed in a __________
Choose the correct answer:
If a marine plant is transferred to fresh water, it bursts due to ___________
Mention whether the following statement is true (T) or false (F) and give explanation in support of your answer.
Plasmolysis is reverse of deplasmolysis.
Two potato cubes each 1 cm3 in size, were placed separately in two containers (A and B), the container A having water and the other (B) containing concentrated sugar solution. After 24 hours when the cubes were examined, those placed in water were found to be firm and had increased slightly in size and those placed in concentrated sugar solution were found to be soft and somewhat decreased in size. Use the above information to answer the questions that follow:
Account for the softness and decrease in size of the potato cubes which were placed in sugar solution.
A leaf cell of a water plant was placed in a liquid other than pond water. After sometime, it assumed a shape as shown below:
Comment on the nature (tonicity) of the liquid surrounding the cell.
Name the following:
Name the process by which water enters the root hair cell.
DPD of a cell can be expressed as ______
