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Cell - Structure and Functions
Write short notes on the following: (a) Cytoplasm (b) Nucleus of a c...

Write short notes on the following: (a) | Class 8 Science Chapter Cell - Structure and Functions, Cell - Structure and Functions NCERT Solutions

Welcome to the NCERT Solutions for Class 8 Science - Chapter Cell - Structure and Functions. This page offers a step-by-step solution to the specific question from Exercise 1, Question 3: . With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 3:

Write short notes on the following:
(a) Cytoplasm
(b) Nucleus of a cell

Answer:

Cytoplasm: Cytoplasm is a fluid like substance which fills the cell and it is present between the plasma membrane and the nucleus. In cytoplasm, cell organelles like ribosomes, mitochondria and golgi bodies are suspended. Exchange of material between cell organelles is done with the help of cytoplasm.
Nucleus of a cell: The spherical structure is present in the center of the cell called as nucleus. It is composed of the following components:

chromosome

Nuclear membrane: A double layered membrane which separates the contents of the nucleus from the cytoplasm is known as nuclear membrane. Pores that are present in the nuclear membrane which allows the transfer of specific substance in and out of the nucleus.
Nucleolus: The spherical bodies which are not bounded by a membrane called as nucleolus.
Chromosomes: The thread like structure which carry genes. Genes have the necessary information for the transfer of different characteristics from parents to the offspring. Therefore, inheritance mainly depends on the chromosomes.

Other Questions of Chapter Cell - Structure and Functions

Complete the crossword with the help of clues given below:
Across
1. This is necessary for photosynthesis.
3. Term for component present in the cytoplasm.
6. The living substance in the cell.
8. Units of inheritance present on the chromosomes.

Down
1. Green plastids.
2. Formed by collection of tissues.
4. It separates the contents of the cell from the surrounding medium.
5. Empty structure in the cytoplasm.
7. A group of cells.

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

‘Cells are the basic structural units of living organisms’. Explain.

Where are chromosomes found in a cell? State their function.

Explain why chloroplasts are found only in plant cells?

State the difference between eukaryotes and prokaryotes.

Indicate whether the following statements are True (T) or False (F).
(a) Unicellular organisms have one-celled body. (T/F)
(b) Muscle cells are branched. (T/F)
(c) The basic living unit of an organism is an organ. (T/F)
(d) Amoeba has irregular shape. (T/F)

Make sketches of animal and plant cells. State three differences between them.

Which part of the cell contains organelles?

Popular questions of class 8 Science

Describe with the help of a diagram an instrument which can be used to detect a charged body.

Sketch larynx and explain its function in your own words.

Arrange the following boxes in proper order to make a flow chart of sugarcane crop production.

Make a labelled diagram of a candle flame.

What is metamorphosis? Give examples.

The following Table shows the total power shortage in India from 1991– 1997. Show the data in the form of a graph. Plot shortage percentage for the years on the Y-axis and the year on the X-axis.

Describe the construction of a kaleidoscope.

What is a constellation? Name any two constellations.

Draw a labeled sketch of the human eye.

Write notes on—
(a) Adam’s apple.
(b) Secondary sexual characters.
(c) Sex determination in the unborn baby.

Recently Viewed Questions of Class 8 Science

How are babies produced through IVF technique? What are such babies called?

What is menstruation? Explain.

Do all the stars in the sky move? Explain.

Should the handle and bristles of a tooth brush be made of the same material? Explain your answer.

Suggest three measures to protect ourselves from lightning.

Explain how the use of CNG in automobiles has reduced pollution in our cities.

Fill in the blanks:

(a) Microorganisms can be seen with the help of a ____________.
(b) Blue green algae fix __________ directly from air to enhance fertility of soil.
(c) Alcohol is produced with the help of __________.
(d) Cholera is caused by __________.

Explain why a charged balloon is repelled by another charged balloon whereas an uncharged balloon is attracted by another charged balloon?

‘Avoid plastics as far as possible’. Comment on this advice.

Select the correct word from the following list and fill in the blanks.
float, water, crop, nutrients, preparation

(a) The same kind of plants grown and cultivated on a large scale at a place is called _____________.
(b) The first step before growing crops is _____________ of the soil.
(c) Damaged seeds would _____________ on top of water.
(d) For growing a crop, sufficient sunlight and _____________ and _____________ from the soil are essential.

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

Read the question carefully and focus on the core concept being asked.
Reference examples and data from the chapter when answering questions about Cell - Structure and Functions.
Review previous year question papers to get an idea of how such questions may be framed in exams.
Practice answering questions within the time limit to improve your speed and accuracy.
Discuss your answers with your teachers or peers to get feedback and improve your understanding.

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