Single Matching Questions Match the contents of the column I and II. Column I Column II 1. Robert Hooke (a) protoplasm 2. Robert Brown (b) cell theory 3. Schleiden and Schwann (c) the term ‘cell’ 4. Von Mohl (d) diffusion 5. Cellulose (e) nucleus 6. Glycogen (f) inheritance 7. Mitochondria (g) energy 8. Chromosomes (h) glucose synthesis 9. Chloroplasts (i) Golgi apparatus 10. Nucleus (j) storage 11. Cell wall (k) Cellulose 12. Central vacuole (l) DNA plus histone 13. Chromatin (m) double membrane (n) cell sap

1-c Robert Hooke discovered ‘Cell’ in the year 1665. He observed the dead cell wall of plant cells and found a honey comb structure. 2-eRobert Brown, a Scottish botanist discovered the nucleus in plant cells the year 1831. He discovered the nucleus while studying the process of fertilization. 3-b Jakob Matthias Schleiden first proposed that all the plants consist of cells and Theodor Schwann stated that all plants are animals are made up of cells. 4-aJ.E.Purkinje in 1839 gave the term protoplasm for the living substance present inside the cell. Von Mohl redefined the term protoplasm in 1846. He coined the word with reference to the embryonic stage found in eggs. *Von Mohl is not mentioned in the textbook. 5-i Golgi apparatus acts as an area of assembly for the storage and processing of cellulose inside a cell. It is involved in the synthesis of cell wall, plasma membrane and lysosomes 6-j Glycogen is a multibranched polysaccharide glucose chain which is stored in animal cells. It is a form of energy storage. This form of glucose is made up of many glucose molecules and is called glycogen. 7-g Mitochondria perform cellular respiration. It breaks down the nutrients and converts them into energy. They use molecular oxygen from air to oxidise the carbohydrates and fats present in the cells to carbondioxide and water vapour. 8-f Chromosomes are thread like structures that contain the genetic material in the form of genes that gets inherited to the offsprings during the formation of gametes. 9-h The chloroplast is the plant cell organelle where glucose is formed through the process of photosynthesis. chloroplast contain a green pigment called chlorophyll which traps the sunlight. 10-m The nucleus is a double-membraned structure enclosed by a nuclear envelope. The nuclear envelope seperates the nucleus from the cytoplasm 11-K Cellulose is one of the compositions of the plant cell wall. Cellulose is a polysaccharide. It consis of tiny cellulose fibres called microfibrils. 12-n Central vacuole comprises of cell sap and tonoplast. The cell sap involves the liquid stored inside the vacuoles. The cell sap is a watery solution rich in sugars, amino acids, proteins, minerals etc. 13-l Chromatin is a thin, thread-like loosely condensed form of the chromosome. Chromatin consists of genetic substance DNA and histone (proteins).

Match the pairs. Column A Column B a. Interferon 1. Diabetes b. Factor 2. Dwarfness c. Somatostatin 3. Viral infection d. Interleukin 4. Cancer 5. Hemophilia

a- 3 Interferon is a protein released by the body cell in response to the entry of a virus. It has the property of inhibiting virus multiplication. It is the first line of immune defence against viruses. b- 5 In haemophilia A, the body does not have enough of a protein called factor VIII, which stops making clots and bleeding. Haemophilia A can be moderate, or sometimes severe, depending upon how little factor VIII is present. c- 2 Dwarfism or short stature occurs when an organism is shorter than the average height. In humans, an adult height of lesser than 4 feet 10 inches is considered dwarf. Somatostatin hampers the production of growth hormones, causing dwarfism. d- 4 Interleukin is a protein that regulates cell growth, differentiation, and motility. It is used against cancer. Column A Column B a. Interferon 3. Viral infection b. Factor 5. Haemophilia c. Somatostatin 2. Dwarfness d. Interleukin 4. Cancer

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How was the cell discovered?

Important Questions on The Fundamental Unit Of Life

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Science>Biology>The Fundamental Unit Of Life>Microscope

An exception to cell theory is

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Science>Biology>The Fundamental Unit Of Life>Microscope

Write down three basic characteristics of a cell.

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Science>Biology>The Fundamental Unit Of Life>Microscope

Explain the statement, “Cell is the functional unit of life”.

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Science>Biology>The Fundamental Unit Of Life>Microscope

Who discovered cells, and how?

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Science>Biology>The Fundamental Unit Of Life>Microscope

What role did the microscope play in the development of the cell theory?

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Science>Biology>The Fundamental Unit Of Life>Microscope

Name the building blocks of living beings. What are they made of?

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Science>Biology>The Fundamental Unit Of Life>Microscope

‘Cell is a dynamic place’. Explain.

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Science>Biology>The Fundamental Unit Of Life>Microscope

Why is the cell called the structural and functional unit of life?

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Science>Biology>The Fundamental Unit Of Life>Microscope

Single Matching Questions
Match the contents of the column I and II.

Column I	Column II
1. Robert Hooke	(a) protoplasm
2. Robert Brown	(b) cell theory
3. Schleiden and Schwann	(c) the term ‘cell’
4. Von Mohl	(d) diffusion
5. Cellulose	(e) nucleus
6. Glycogen	(f) inheritance
7. Mitochondria	(g) energy
8. Chromosomes	(h) glucose synthesis
9. Chloroplasts	(i) Golgi apparatus
10. Nucleus	(j) storage
11. Cell wall	(k) Cellulose
12. Central vacuole	(l) DNA plus histone
13. Chromatin	(m) double membrane
	(n) cell sap