Consider the following statements: (𝑎) Ribosomes are the protein factories of the cell. (𝑏) The proteins formed are transported by the Golgi complex to different parts according to their requirements. (𝑐) Mitochondria provide energy for the wörking of the cell. (𝑑) Lysosomes are the suicidal bags where dead and damaged organelles are destroyed. Answer the following questions based on the above information: (𝒊) What would happen if any one of the above mentioned organelles are absent in the cell? (𝒊𝒊) What values shown by the cell organelles can be related to humans? (𝒊𝒊𝒊) Give one situation in your everyday life where such values are exhibited. Open Answer »
What are the colours absorbed by plants? The green light of the sunlight is blocked. How will the photosynthesis be affected? Open Answer »
A solution of 3% glucose and a solution of 8% glucose are kept in a trough separated by a semipermeable membrane. What will you observe after 1 hour? Open Answer »
A person takes concentrated solution of salt, after sometime, he starts vomiting. What is the phenomenon responsible for such situation? Explain. Open Answer »
If cells of onion peel and RBC are separately kept in hypotonic solution, what will happen to each of them? Explain the reason for your answer. (a) Both the cells will swell. (b) RBC will burst easily while cells of onion peel will resist the bursting to some extent. (c) (a) and (b) both are correct. (d) RBC and onion peel cells will behave similarly. Open Answer »
In brief state what happens when: (a) dry apricots are left for sometime in pure water and later transferred to sugar solution? (b) a red blood cell is kept in concentrated saline solution? (c) the plasma membrane of a cell breaks down? (d) rheo leaves are boiled in water first and then a drop of sugar syrup is put on it? (e) golgi apparatus is removed from the cell? Open Answer »
Illustrate only a plant cell as seen under electron microscope. How is it different from animal cell? Open Answer »