If you are provided with some vegetables to cook. You generally add salt
into the vegetables during cooking process. After adding salt, vegetables
release water. What mechanism is responsible for this?
We eat food composed of all the nutrients like carbohydrates, proteins,
fats, vitamins, minerals and water. After digestion, these are absorbed in
the form of glucose, aminoacids, fatty acids, glycerol etc.
What mechanisms are involved in absorption of digested food and water?
A person takes concentrated solution of salt, after sometime, he starts
vomiting. What is the phenomenon responsible for such situation? Explain.
Why does the skin of your finger shrink when you wash clothes for a long time?
Do you agree that “A cell is a building unit of an organism”. If yes, explain why?
Select the odd one out
(a) The movement of water across a semi permeable membrane is affected
by the amount of substances dissolved in it.
(b) Membranes are made of organic molecules like proteins and lipids
(c) Molecules soluble in organic solvents can easily pass through the
membrane.
(d) Plasma membranes contain chitin sugar in plants
Living cells were discovered by
(a) Robert Hooke
(b) Purkinje
(c) Leeuwenhoek
(d) Robert Brown
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