Question 1 : Plasma membrane is called selectively permeable membrane because it allows the movement of only selected molecules across it and not all of them. Is it true?

Question 4 : The skin of your fingers shrink when you wash clothes for a long time due to exosmosis. Is it true?

Question 5 : When a red blood cell is kept in concentrated salt solution, they shrink and give a shrivelled appearance (crenation). Is it true?

Question 6 : 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 7 : The diffusion of water or solvent through a semi-permeable membrane from a solution of lower concentration of solutes to a solution of higher concentration of solutes is called _______.

Question 8 : 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 9 : Which kind of plastid is more common in flowers and fruits?

Question 11 : 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 12 : Name the organelle which show analogy written as: Storage sac of the cell.

Question 15 : 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 16 : Amoeba obtain its food by the process of phagocytosis. State true or false.

Question 17 : As lysosomes are organelles which on bursting can kill cells possessing them, they are called suicide bags. Is it true?

Question 18 : Name the organelle which show analogy written as: Transporting channels of the cell.

Question 20 : Which kind of plastid is more common in leaves of the plant?

Question 21 : 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 22 : Do you agree that a cell is the building unit of an organism?

Question 23 : Can you name the organelles we have studied that contain their own genetic material?

Question 24 : Name the organelle(s) in a plant cell that contain their own genetic material and ribosome.

Question 26 : If the organization of a cell is destroyed due to some physical and chemical influence, it will not be able to maintain homeostasis and thus will not be able to perform basic functions ( such as respiration, obtaining nutrition ,etc. )and such a cell will ultimately die. Is it true?

Question 27 : When golgi apparatus is removed from the cell, formation of lysosomes, secretory vesiscles will stop. Is it true?

Question 29 : 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 30 : 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 32 : Name the organelle which show analogy written as: Power house of the cell.

Question 33 : How do substances such as carbon dioxide and water move in and out of the cell?

Question 34 : 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 35 : 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 36 : Where do the lipids and proteins constituting the cell membrane get synthesized?

Question 37 : 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 38 : Which type of cell division is required for growth and repair of body?

Question 39 : 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?