Cell Structure and Functions NCERT Solutions - Class 8 Science

NCERT Solutions for Class 8 Science Chapter 8 - Free PDF Download

NCERT Solutions Class 8 Science Chapter 8 are prepared by the subject experts at Vedantu to help students get a clear understanding of the topics covered in the chapter. Students can consult with the revision notes provided in this text. The solved exercises are going to help students prepare the chapter for their exams. With the help of the NCERT Solutions for Chapter 8 Class 8 Science "Cell structure and function" students can learn and understand the chapter thoroughly. Also, they can download these NCERT Solutions for free of cost from Vedantu.

The solutions for NCERT Class 8 Science Chapter 8 Cell structure and functions will be a useful resource for you in revising the chapter quickly to get clarity on the chapter before the examinations. Keep in mind to practice it daily. These NCERT solutions will help you develop your pace of writing answers to the questions and boost your confidence for the exam.

Students can also download NCERT Solution PDF for all subjects to prepare for their forthcoming exams. Maths Students who are looking for the better solutions ,they can download Class 8 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.

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Class 8 - Science - Cell - Structure and Functions part-1

Access NCERT Solutions for Class 8 Science Chapter 8 – Cell-Structure and Functions

1) Indicate Whether the Following Statements are True (T) or False (F).

a) Unicellular organisms have one-celled body.

Ans. True

b) Muscle cells are branched.

Ans. False

c) The basic living unit of an organism is an organ.

Ans. False

d) Amoeba has irregular shape.

Ans. True


2) Make a Sketch of the Human Nerve Cell. What Function Do Nerve Cells Perform?

Ans. The function of the nerve cell is to receive and transmit messages, helping the brain to regulate and coordinate the activity of various parts of the body.

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3) Write Short Notes on the Following.

a) Cytoplasm.

Ans. The cytoplasm is a fluid-like substance between the nucleus and the plasma membrane. Various cell organelles such as ribosomes, mitochondria, endoplasmic reticulum, etc. are suspended in the cytoplasm. It helps in the exchange and storage of substances between cell organelles.


b) Nucleus of a Cell.

Ans. The nucleus is the cell master, it controls all cell operations. It is usually located in the centre of the cell and has a circular shape. A membrane called the nuclear membrane separates it from the cytoplasm. It also contains DNA and RNA. This perforated membrane allows for the transfer of substances in the nucleus and cytoplasm. The nucleus contains a dense body called Nucleolus that contains chromosomes.


4) Which Part of the Cell Contains Organelles?

Ans. Cytoplasm, a fluid-like structure located inside the plasma membrane. It is a large part of the cell, which holds all the organelles of the cell such as the nucleus, mitochondria, Ribosomes, Golgi body, ER and all.


5) Make Sketches of Animal and Plant Cells. State Three Differences Between Them.

Ans. 

Animal Cells

Plant Cells

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Animal cells do not have chloroplasts.

Plant cells have chloroplasts. Chloroplasts enable plants to perform photosynthesis to make food.

They are generally small in

size.

They are usually larger than

animal cells.

Cell wall is absent.

Cell wall is present.


6) State the Difference Between Eukaryotes and Prokaryotes.

Ans. 

Eukaryotes

Prokaryotes

Eukaryotes exist as both unicellular and multicellular organisms.

Prokaryotes are unicellular organisms in nature.

Nucleolus is present here.

Nucleolus is absent here.

Lysosomes and Peroxisomes present in eukaryotes.

Lysosomes and Peroxisomes are absent in prokaryotes.

Ribosomes are larger.

Ribosomes are smaller.

For example: Fungi, plant, and animal cells.

For example: Bacteria and blue-green algae.


7) Where are Chromosomes Found in a Cell? State Their Function.

Ans. Chromosomes are in the form of chromatin found in the nucleus. Chromosome is a gene that stores all kinds of the data which is then passed on from one generation to the next.


8) 'Cells are the Basic Structural Units of Living Organisms.’ Explain.

Ans. Each living thing is made up of cells, plants or animals, bacteria or any other living thing, all made up of different cell types. Organisms that are as simple as viruses, have a single cell type to perform all the functions needed to survive. For complex organisms like human beings the various types of cells come together and form tissues, organs, organ systems and living organisms. Each cell type varies in shape, size and functions.


9) Explain Why Chloroplasts are Found Only in Plant Cells?

Ans. Chloroplasts are found in plant cells only because chloroplasts contain chlorophyll essential for photosynthesis. Chlorophyll captures sunlight and uses it to prepare plant food through the process of photosynthesis.


10) Complete the Crossword with the Help of Clues Given Below.

      Across

1. This is necessary for photosynthesis.

2. Term for components 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.

3. It separates the contents of the cell from the surrounding medium.

4. Empty structure in the cytoplasm.

7. A group of cells.

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Ans. 

  1. CHLOROPHYLL

  2. ORGAN

  3. ORGANELLE

  4. MEMBRANE

  5. VACUOLE

  6. PROTOPLASM

  7. TISSUE

  8. GENES

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NCERT Solutions for Class 8 Science Chapter 8 - Cell - Structure and Functions

It is easy to download the NCERT Solutions Cell structure and function Class 8 PDF from the official website and mobile app of Vedantu. The NCERT Solutions for Class 8 Science Chapter 8 Cell Structure and Functions are organized by the team of our experts to help students with their school assignments and exam preparation. Our NCERT Solutions are available for all subjects in a chapter-wise format. Class 8 Science Chapter 8 Cell Structure and Functions is a vital topic as it is fundamental for all of the organic research. By referring to the NCERT Solutions Class 8 Science Chapter 8 students will be able to learn the chapter in a comprehensive manner.

 

NCERT Solutions For Class 8 Science Chapters

Chapter 8 - Cell Structure and Functions

NCERT Science Class 8 Chapter 8 Cell Structure and Functions is an engaging topic. After analyzing solutions for Class 8 Science Chapter 8, you will get a clear idea of various parts of a cell such as a nucleus, cytoplasm, organelles. Also, you will get to learn the difference between eukaryotes and prokaryotes. This chapter covers the concepts of chromosomes, cell shape and function, parts of the cell, plant, and animal cells. NCERT Solutions Class 8 Science Chapter 8 will help students to develop a strong understanding of these concepts. These NCERT Solutions are available in a free downloadable PDF. 

 

Class 8 Science Chapter-wise Marks Weightage

This Class 8th Science Chapter 8 has a weightage of 20 marks and this is one of the most important topics covered in the syllabus of Class 8 Science. The solutions are prepared based on the latest CBSE guidelines and by going through the NCERT Solutions Class 8 Science Chapter 8 students can understand the question pattern of the exam.

Here is more detail about the contents of Chapter 8 Cell Structure and Functions Class 8.

 

8.1 Explain the nucleus of the cell in detail. (1 long) 

8.2  Difference between prokaryotes and eukaryotes (1 short)

8.3 What is cytoplasm?  (2 short)

8.4  Cells are basic structural units of a living organism (1short, 1 long)

8.5 Explain why chloroplasts are found only in plant cells. ( 1 short) 

 

Why are NCERT Solutions for Class 8 Science Chapter 4 Important?

  • Our experts have made it as simple as possible for a better understanding of students.

  • Our answers focus on fundamentals to help the students clear the basic concepts.

  • It covers all the important topics of the chapter helping students to score better.

  • It helps to increase self-confidence in students.

  • All solutions are provided by the subject experts which make learning easy.

  • NCERT solutions consist of all chapter answers and also some interesting activities. 

  • By reading this you will get an overall knowledge of the chapter.

FAQs (Frequently Asked Questions)

Q1. The Cell is a simple structural unit of living organisms.

Answer: All plants and animals are made up of cells. It is the smallest unit of life and performs various functions. They are the building blocks of our existence. This is the purpose why cells are referred to as 'the primary structural and functional blocks of existence'. Cells exist in various styles and sizes and perform an extensive variety of activities. Their styles and sizes are associated with the function they perform. They are an important part of living organisms without which life is not possible. Cell carries out various functions such as respiration, transportation, excretion,  reproduction, and many more.

Q2. Explain the Nucleus of the Cell in detail.

Answer: The nucleus is a double-membrane bound cellular organelle present in cells. it consists of the DNA, the genetic material. It is the command center of the cell and is round in shape. It consists of the following components. 

  • Nuclear Membrane: It is a double-layered membrane. It separates the contents of the nucleus from the cytoplasm and acts as a wall. It has pores that allow the switch of positive substances inside and outside of the cell.

  • Nucleolus: It has a small dense round body. It is not bounded by a membrane.

  • Chromosome: These are thread-like structures that deliver genes.

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