Long Answers - Cell - Structure and Functions, Science, Class 8 Class 8 Notes | EduRev

Class 8 Science by VP Classes

Class 8 : Long Answers - Cell - Structure and Functions, Science, Class 8 Class 8 Notes | EduRev

The document Long Answers - Cell - Structure and Functions, Science, Class 8 Class 8 Notes | EduRev is a part of the Class 8 Course Class 8 Science by VP Classes.
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LONG ANSWER TYPE QUESTIONS 
 

Q. 1. Explain the position and functions of nucleus in a cell.
Ans.
Nucleus is the most important component of the living cell. It is round or spherical in shape and situated in the centre of the cell. Nucleus is separated from cytoplasm by a membrane called nuclear membrane. This membrane is porous and allows the movement of materials between the cytoplasm and inside of the nucleus. There is a small and spherical body in the nucleus. It is called nucleolus. Nucleus contains thread-like structures called chromosomes. These carry genes and help in inheritance or transfer of characters from the parents to the offspring. Nucleus also acts as a control centre of the activities of the cell.
 

Q. 2. Compare the plant cell and animal cell.
Ans.

S. No.

Part

Plant Cell

Animal Cell

1.

Cell membrane

Present

Present

2.

Cell wall

Present

Absent

3.

Nucleus

Present

Present

4.

Nuclear membrane

Present

Present

5.

Cytoplasm

Present

Present

6.

Plastids

Present

Absent

7.

Vacuole

Present and big

Absent or small

 
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