Indian School Al Wadi Al Kabir s1

INDIAN SCHOOL AL WADI AL KABIR

CLASS:IX DEPARTMENT OF SCIENCE 2016-17 DATE: 21.08.16 WS NO:6 BIOLOGY NAME: CHAPTER- THE FUNDAMENTAL UNIT OF LIFE

I. Answer the following in one word or sentence

1. What is DNA?

2. Name the organelles that have its own genetic materials

3. What is endocytosis?

4. Name two structures found only in animal cells and not in plant cells.

5. Identify the organelle for protein synthesis.

II. Answer the following in 30 words

1. Why cell is called the structural and functional unit f life?

2. Why lysosomes are known as suicide bags?

3. What is membrane biogenesis?

4. Why plasma membrane is called a selectively permeable membrane?

5. Why is endocytosis found in animals only?

III .Differentiate between

(i) Endosmosis and Exosmosis?

(ii) SER and RER

(iii) Cell wall and Plasma membrane

(iv) Osmosis and Diffusion

(v) Prokaryote and Eukaryotes

IV. Answer the following in 50 words 1. A person takes concentrated solution of salt. After sometime he starts vomiting. What is the phenomenon responsible for such a situation?

2. Briefly describe the two types of ER and state its functions

3. Which organelle is known as the power house of the cell? Why?

4. Why does the skin of the fingers shrink when you wash clothes for a long time?

5. State the consequences of following conditions:

(i) A cell having higher water concentration than the surrounding medium.

(ii) A cell containing low concentration than the surrounding medium

6. Draw a plant cell and label the following parts:

(i) Packaging materials coming from ER

(ii) Storage sac Page 1 of 2

(iii) Is a fluid contained inside the nucleus

(iv) Power house of the cell

7. In brief what happens when

(a) Dry apricots are left for some time in pure water and later transferred to sugar solution

(b) A red blood cells are kept in concentrated salt solution

(c) Rheo leaves are boiled in water and then a drop of sugar syrup is put on it

8. Name and draw a cell which does not have a well-defined nuclear region. Label any four parts.

PREVIOUS YEARS’ BOARD PAPER QUESTIONS

1.State any one function of Golgi apparatus. (1M) 2.Which microorganism lacks any kind of membrane? (1M) 3. Write the names of two cellorganelles that contain their own genetic material? (1M) 4.Give one function of RER and SER. (2M) 5.How does endocytosis help an organism like amoeba? (2M) 6.(a)Name the different organelles which perform functions like protein/lipids synthesis, make specificdigestion, energy generation? (b)Which ER plays a crucial role in detoxifying many poisons and drugs?

(c)Write functions of Golgi apparatus. (3M)

7.(a)Mitochondria is called power house of the cell. Justify this statement. (b)Mention the use of deep folding in the inner membrane of mitochondria. (3M) 8. Grass looks green,papaya appears yellow.Which is the cell organelle responsible for this?Write the structural features of this organelle. (3M)

Prepared by MrsNittyRajan