REVISION QUESTION FOR CLASS 8

                                 

	Cell structure and function
Multiple choice question	(1- marks each)

le Cell was discovered by :
	i.	Louis Pasteur ii. Robet hook			iii. Fleming iv. none of these
2.	These are the structural and functional units of life:
	i.	Tissue	ii. Cell	iii. Organ	iv. Organism
3.	An example of a unicellular cell:
	i.	Euglena	ii. Tapeworn		iii. Grasshopper	iv. All of these
4.The smaller cell is :
	i. Mycoplasma		ii. Ant	iii. Algae	iv None of these

5.The smallest cell is found in :

i.WBC ii. RBC iii. Platelets iv. All of these 6.The large animal cell is :

i.	Ostrich egg ii.Hen’s egg iii.Snake’s egg iv.None of these

7.Cell that change their shape continuously:

i.Amoeba ii.WBC iii.Snake’egg iv. None of these 8.The outermost covering of the body of the cell is called :

i. Cell membrane ii. Cytoplasm iii. Nucleus iv. None of these fill in the blanks :

i.Locomotory organ in paramoecium are……… .

ii.Vacloroplasts are present in ………..cell.

iii.Choloroplasts are present in…...…...cell.

iv.……….is a filamentous algae with identical cell.

i.Cell wall is made of………… .

ii.Mitochondria contain………..that are needed for respiration

iii.All cell arise from ……….. Cell only

iv.Cell were first observe in cork by ……….

v.…………. Is seperated from cytoplasm by a nuclear memorane.

vi.Green plastids containing chlorophyll are called……. .

VERY SHORT ANSWER QUESTION

(1MARKS EACH)

1.Name two unicellular organisms ?

2.Name two Multicellular organisms ?

3.Name a cell which can be seen by an unaided eye ?

4.Name the structural unit of an organism ?

5.Who discovered the cell and when ?

6.Name the part of cell which help in control of the activities ?

7.Write the name of unit of inheritance in livings ?

8.Which part of the cell gives the shape to a cell ?

9.What is protoplasm ?

10.Name two cells which can change their shape ?

SHORT ANSWER QUESTION	(2 MARKS EACH)
1.Why is the mitochondria called the ‘powerhouse’ of the cell?
2.What is the function of chloroplast?

3.Write the function of the cell wall? 4.What are the chromosomes?

5.How do unicellular organism differ from multicellular organism? 6.Distinguish between prokraryotic cells and eukaryotic cells? 7.Distinguish between plant cell and animal cell?

8.What is plastids?write their function?

9.Why could cells not be observed before 17th century ? 10.Cells are the building blocks of the life ?

ANSWER THESE QUESTION

(3 MARKS EACH)

1.Explain the structure of a cell ?

2.Explain the structure of onion cell with the help of a slide ?

3.Write the functions of mitochondria, golgi bodies and ribosomes ?

4.Explain prokaryotic and eukaryotic cells ?

5.What is gene ? What is its function ?

Long answer question:

(5 marks each)

1.Draw well labelled diagram of animal cell and plant cell?

2.Draw different types of cell in humans?

3.Draw plant and animal cell according to their parts?

4.Make a sketch of the human nerve cell. What function do nerve cell perform?.

5.Draw the structure of a cell observed in an onion peel?write the function of cell wall, cell membrane ands cytoplasm?