Class 8th / Biology / Chapter - Cell Structure and Function // Short Answer type Questions
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Question 1.
Make a sketch of the human nerve cell. What function do nerve cells perform ?
Answer :- 
The nerve cell receives and transfers message , thereby helping to control and coordinate the working of different parts of the body .
Question 2.
Write short notes on the following
1. Cytoplasm
2. Nucleus of a cell
Answer :-
1.Cytoplasm :- It is the jelly - like substance found between the nucleus and the cell membrane . It contains the nucleus and many small structures called organelles . Cytoplasm , along with nucleoplasm , forms the living substance of the cell , called the protoplasm.
2. Nucleus of a cell :- It is an important component of the living cell . It is generally spherical and located in the center of the cell. The Nucleus is separated from the cytoplasm by a membrane called the nuclear membrane . The liquid substance of the nucleus is termed nucleoplasm . There is a smaller spherical body in the nucleus which is called the nucleus . The Nucleus also contains thread - like structures called chromosomes . These carry genes and help in inheritance . The Nucleus acts as the control center of the activities of the cell .
Que 3.
Which part of the cell contains organelles ?
Answer :- The Cytoplasm contains organelles of the cell .
Que 4. State three difference between animal cells and plant cells .
Answer :-
| Plant cells | Animal cells |
|---|---|
| 1. The outermost covering is cell wall which is made of cellulose. 2. Plastids (chloroplast) is present . 3. Large vacuoles are present . |
1. The outermost covering is the plasma membrane which is living material . 2. Plastids (chloroplast) is absent . 3. No or small vacuoles Eire present . |
Que 5. Where are chromosomes found in a cell ? State their function .
Answer :- Chromosomes are found in the nucleus of the cell . They carry genes and help in inheritance i.e. transfer of Characters from the parents to the offspring .
Que 6. Cells are the basic structural units of living organisms . Explain
Answer :- All organisms are made up of cells .They have different designs , shapes and size in the living organism . All the life processes take place inside a cell . Many similar cells aggregate together to make a tissue .So se can say that Cells are the basic structural units of living organisms .
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