Lakhmir singh solutions biology class 9 Solutions for Chapter 2 the fundamental unit of life cell

Exercises in Chapter 2 the fundamental unit of life cell Grade 9

Exercise

Questions in Exercise

Distinguish between prokaryotic and eukaryotic cells.

Write down the differences between organ and organelle.

Write down the differences between the nucleus and nucleoid.

Mention differences between light microscope and electron microscope.

Give a brief account of the discovery of the cell.

Describe the proteins of the plasma membrane.

Enumerate functions of the plasma membrane.

Give an example of diffusion across the plasma membrane.

Set up an experiment to demonstrate osmosis.

Write down the differences between diffusion and osmosis.

Write a note on endocytosis.

What would happen when eukaryotic cells are placed in hypotonic, hypertonic and isotonic solutions?

Name the following:

(a) Smallest cell organelle

(b) Largest cell organelle

(d) Functional segments of the DNA molecule

Distinguish between the following:

(a) Chromoplast and chloroplast

(b) Ribosome and centrosome

Write the main differences between plant and animal cells.

What will happen in a cell if its nucleus is removed? Give reasons in support of your answer.

Explain why do spinach look green, papaya yellow and edible part of watermelon red?

Write down two main functions of

(a) Endoplasmic reticulum

(b) Lysosome

Name the following:

(a) The cell organelle which synthesizes protein.

(b) The type of plastid which stores food

"Lysosomes are known as suicide bags.” Why?

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