Describe structure and functions of plasma membrane.

Write a note on endocytosis.

Give a brief account of discovery of the cell.

Write main differences between plant and animal cells.

Write down the differences between diffusion and osmosis.

Set up an experiment to demonstrate osmosis.

Khushi wanted to eat rice and kidney bean (rajmah). She requested her mother to cook the same for lunch tomorrow. At night her mother took a cup of kidney bean and put them in a container having some water. She kept the container covered overnight. Next morning, she cooked rice and kidney beans for lunch. Khushi inquired her mother the following questions:

(i) Why dis dhe soak jkidney beans in water overnight?

(ii) Name the scientific phenomenon involved in above process.

(iii) name atleast one more food item that is cooked in this way.

Describe with a diagram the fluid mosaic organisation of the plasma membrane.

One day Muskan saw her mother making pickle. Her mother cut the carrots, turnip and cauliflowers into small pieces, washed them and put them in the sun for few hours. Thereafter, she mixed common salt, oil, paste of onion, ginger and garlic, gur, red chilli, turmeric powder, acetic acid, etc. As per requirement with the cut vegetables and heated them. After cooling, she put the contents in the air tight jar and kept it in the sun for many days.

(i)Why did Muskan’s mother cur the vegetables into small pieces and put them in the sun for few hours?

(ii) Why did she mix common salt in the cut vegetables and heated it? Name the process involved.

(iii) Why did she mix acetic acid?

What is the location of following in the cell:

(a) Chromatin (b) Chromosome (c) Tonoplast (d) Nucleolus

What are three main functional regions of the cell?