NCERT Solutions for Class 9 Science Chapter 5 – Fundamental Unit of Life

NCERT Solutions for Class 9 Science Chapter 5 ‘Fundamental Unit of Life’ cover all the major concepts which have been discussed in the chapter. As the name suggests, this chapter deals with the fundamental unit of all living beings which is known as a cell. It discusses the different components of a cell and their working as well as properties. 

There are 10 exercise questions in this chapter. These include descriptive questions, comparative analysis, diagrammatic questions and analytical questions. The NCERT solutions for class 9 science chapter 5 will introduce you to the concepts of prokaryotic cells, eukaryotic cells, plasma membranes, permeability etc. 

CBSE Class 9 NCERT Chapter 5 is the foundation block of your biology syllabus, which is a part of your overall CBSE science syllabus. It pays emphasis on each and every aspect of the cell. All the constituting units are studied intricately. The difference between animal and plant cell has also been dealt with in the chapter. In case of any doubts in the chapter, NCERT solutions by Instasolv are the best study resource for you. 

Important Topics of NCERT Class 9 Science Solutions for Chapter 5 – Fundamental Unit of Life

Discovery of cell and its importance

The CBSE class 9 science NCERT chapter 5 begins with the basic about the fundamental unit of life – the cell. In this topic, you will learn that the cell was discovered by Sir Robert Hooke, who was an English botanist. He discovered the cell in the year 1665 with the help of a primitive microscope while observing a cork slice. The cell is the smallest unit of life and at the same time, it is capable of performing all life functions. Because of this property, it is the building block of all living organisms and hence is referred to as the structural and functional unit of life. 

Components of a cell

The chapter also talks about the various components of the cell. Components of animal cells are lysosomes, mitochondria, Golgi bodies, rough endoplasmic reticulum, smooth endoplasmic reticulum, cell membrane, cytoplasm, ribosomes, nucleus and nucleolus. In case of a plant cell, the components include chloroplast, a cell wall, cell membrane, smooth endoplasmic reticulum, nucleolus, nucleus, rough endoplasmic reticulum, vacuole, cytoplasm, Golgi body, lysosomes and mitochondria. The difference between animal and plant cells on the basis of these components is also discussed in the chapter. 

Types of cells

The Topic explains two major types of cells – the eukaryotic cells and the prokaryotic cells. Prokaryotic cells are unicellular and have a single chromosome whereas, in case of a eukaryotic cell, the cells are multicellular and have more than one chromosome. Based on the presence nucleolus, mitochondria, endoplasmic reticulum and plastids, many more differences between these cells have been explained in the chapter. 


The process of Endocytosis has been discussed in the topic. It is the process through which an amoeba feeds itself. When the cell engulfs solid particles of food through its flexible membranes, the phenomenon is known as Endocytosis. 


This is a very important topic which has been included in the chapter. It is a process which occurs through a selectively permeable membrane. It includes the motion of water molecules from a region of higher concentration to a region of lower concentration. 

Mitosis and meiosis

The two types of cell divisions – mitosis and meiosis have been dealt with in the topic. Mitosis involves the duplication of genetic materials of a cell and its division into two daughter cells. In the case of meiosis, the sex cells of an organism are produced. In the case of meiosis, the meiotic cell produces four distinct cells. Mitosis is required for the growth and repair of our body whereas meiosis is required for gamete production. 

Exercise-wise discussion of NCERT Class 9 Solutions Chapter 5 – Fundamental Unit of Life

  • NCERT Solutions for Class 9 Science Chapter 5 ‘Fundamental Unit of Life’ comprises of various kinds of exercises which primarily test your hold on the concepts and theories that have been introduced and discussed in the chapter. 
  • There are short answer questions, reasoning questions, activity-based questions, descriptive questions and questions which require comparison and observation skills. 
  • The first few exercises demand theoretical knowledge and simple definitions that have been dealt with in the chapter. 
  • Further, the questions ask for the working process of the phenomena explained in the chapter and test your understanding of the same. 
  • There are questions which will ask you to compare different terms and theories that have been introduced in the chapter. 
  • There are also questions which involve reasoning as well as activity-based questions which include simple experiments and observation-based answers. 

About NCERT Class 9 Chapter 5 – Fundamental Unit of Life by Instasolv

  • At Instasolv, we ensure that our solutions are formulated in a student-friendly and easy to understand language.
  • We pay special emphasis on simplifying the CBSE syllabus and create the NCERT solutions accordingly.
  • All the NCERT solutions at Instasolv are derived by our expert team which has a remarkable experience in this field. They understand the requirements of the students with respect to doubt solving and their engagement with the subject matter. 
  • We have covered all the exercises that have been discussed in the chapter and summarized all the essential concepts and ideas of the chapter in one place.