Question 1 :
If the plasma membrane reptures or break down then the constant internal chemical composition of the cell will be lost and it will not be able to perform its basic functions. Is it true?
Question 2 :
Which cell organelle controls most of the activities of the cell?
Question 3 :
The skin of your fingers shrink when you wash clothes for a long time due to exosmosis. Is it true?
Question 4 :
Carry out the following osmosis experiment:
Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,
(a) Keep cup A empty
(b) Put one teaspoon sugar in cup B
(c) Put one teaspoon salt in cup C
(d) Put one teaspoon sugar in the boiled potato cup D.
Keep these for two hours. Then observe the four potato cups and Explain why water gathers in the hollowed portion of B and C.
Question 5 :
When the plasma membrane of a cell breaks down, it results in death of the cell as protoplasmic structures will get dispersed. Is it true?
Question 6 :
Where do the lipids and proteins constituting the cell membrane get synthesized?
Question 7 :
As lysosomes are organelles which on bursting can kill cells possessing them, they are called suicide bags. Is it true?
Question 8 :
A cell having low water concentration or hypertonic cell sap will undergo endosmosis and absorb water from outside. It would become turgid. Is it true?
Question 9 :
When dry apricot are left for some time in pure water and later transferred to sugar solution, can we say that when placed in pure water, dry apricots swell up due to endosmosis. On being transferred to sugar solution, they shrink due to exosmosis?
Question 10 :
Name the organelle which show analogy written as: Kitchen of the cell.
Question 11 :
Name the organelle which show analogy written as: Packaging and dispatching unit of the cell.
Question 12 :
Name the organelle which show analogy written as: Power house of the cell.
Question 13 :
Which type of cell division is required for growth and repair of body?
Question 15 :
Name the organelle which show analogy written as: Digestive bag of the cell.
Question 18 :
Name the organelle which show analogy written as: Transporting channels of the cell.
Question 19 :
Endocytosis is swallowing up of food and other substances (bacteria, viruses) from external medium by the plasma membrane. This is possible only when plasma membrane is in direct contact with external medium. It occurs only in animal cells. Is this true?
Question 21 :
Name the organelles in plant cell that contain their own genetic materials and ribosomes.
Question 22 :
If you are provided with some vegetables to cook, you generally add salt into vegetables during cooking process. After adding salt, vegetables release water. What mechanism is responsible for this?
Question 23 :
If there was no golgi apparatus, there would not be any lysosome for intracellular digestion and cleansing, not complexing of molecules, no exocytosis and no formation of new plasma membrane. Is it true?
Question 24 :
Name the organelle which show analogy written as: Control room of the cell.
Question 27 :
Lysosomes are called scavengers of the cell because they remove cell debris consisting of dead and worn out cell organelle by digesting the same. Is it true?
Question 29 :
Name the organelle(s) in a plant cell that contain their own genetic material and ribosome.
Question 30 :
Carry out the following osmosis experiment:
Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,
(a) Keep cup A empty
(b) Put one teaspoon sugar in cup B
(c) Put one teaspoon salt in cup C
(d) Put one teaspoon sugar in the boiled potato cup D.
Keep these for two hours. Then observe the four potato cups and Why is potato A necessary for this experiment?
Question 32 :
We eat food composed of all the nutrients such as carbohydrates, proteins, fats, vitamins, minerals and water. After digestion, they are absorbed in the form of glucose, amino acids, fatty acids, glycerol, etc. What mechanisms are involved in the absorption of digested food and water?
Question 33 :
Mitochondrion is known as the powerhouse of the cell because it contains enzymes that are needed for stepwise oxidation of food stuffs (carbohydrate, fats or lipids and proteins) present in the cells to $CO_2$ and water. Is it true?
Question 34 :
Osmosis is diffusion of water from the region of its higher concentration (pure water or dilute solution) to the region of its lower concentration (strong solution) through a semipermeable membrane. Is it true?
Question 36 :
A cell having higher water content or hypotonic cell sap will undergo exosmosis and, therefore, lose water. It may undergo plasmolysis. Is it true?
Question 37 :
When golgi apparatus is removed from the cell, formation of lysosomes, secretory vesiscles will stop. Is it true?
Question 38 :
Carry out the following osmosis experiment:
Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,
(a) Keep cup A empty
(b) Put one teaspoon sugar in cup B
(c) Put one teaspoon salt in cup C
(d) Put one teaspoon sugar in the boiled potato cup D.
Keep these for two hours. Then observe the four potato cups and Explain why water does not gather in the hollowed out portions of A and D?
Question 43 :
When rheo leaves are boiled in water first and then a drop of sugar syrup is put on it, can we say that boiling shall kill the leaves?
Question 44 :
A cell having equal water concentration to its surrounding medium will neither gain nor lose water to the external medium.
Is it true?
Question 45 :
Do you agree that a cell is the building unit of an organism?
Question 46 :
Can you name the organelles we have studied that contain their own genetic material?
Question 47 :
Which kind of plastid is more common in leaves of the plant?
Question 48 :
As lysosomes are organelles which on bursting can kill cells possessing them, they are called suicide bags. Is it true?
Question 49 :
If cells of onion peel and RBC are separately kept in hypotonic solution what among the following will take place?
Question 50 :
Amoeba obtain its food by the process of phagocytosis. State true or false.
