Question

05
Q5
QE
Q39. What is plasma membrane or cell membrane?
Q40. What are the different functions of plasma
membrane?
Q41. Why is cell membrane considered as selectively
permeable?
Q42. What do you mean by diffusion? Why is this process
important for the cell?
Q43. Name the physical process by which gaseous
substances can move across the plasma
membrane. How does it occur?
Q44. What happens when carbon dioxide gas
accumulates in high concentration inside the cell?
Q45. Which term is given to the passage of water
molecules along the concentration gradient through
a selectively permeable membrane? Define it.
Q46. Do liquids obey the law of diffusion? Why or why
not?
Q47. What affects the movement of water across the
plasma membrane?
Q48. Define the following:
(a) Hypotonic solution
(b) Isotonic solution
(c) Hypertonic solution
Q49. What will happen if a cell is placed in alan
(a) Hypotonic/dilute solution.
(b) Isotonic solution.
(c) Hypertonic/concentrated solution.
Q50. Why does a cell swell up when kept in a hypotonic
solution?
Q51. Why does a cell shrink when kept in a hypertonic
solution?
Q52. Why size of the cell does not change when kept in
an isotonic solution?
Q53. What would be the direction of water molecules it
a cell is placed in a/an
(a) Hypotonic solution
(b) Hypertonic solution
(c) Isotonic solution
Q54. How can you deshell an egg?
Q55. What is an egg shell made up of?
Q56. What will happen if a deshalled egg is kept in
(a) Pure water for 5 minutes?
(b) Concentrated sugar solution for 5 minutes?
Give reasons to support your answer
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Answer 1

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Explanation:

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