NCERT Solutions for Class 9 Science Chapter 5

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

Chapter 5 Science Class 9 is a fundamental chapter in Biology that describes the types and significant characteristics of a cell, the unit of life. The chapter also covers important topics about the structure of a cell, plasma membrane, nucleus, DNA, and chromatin material which plays a major role in the functioning of the cell of any living organism. The NCERT Solution for Class 9 Chapter 5 provides detailed answers to help students understand the topics covered in the chapter. The answers in the NCERT Solutions Class 9 Chapter 5 are explained with diagrams that provide a comprehensive understanding of the chapter. Maths Students who are looking for better solutions ,They can download Class 9 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.

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NCERT Solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life part-1

NCERT Solutions For Class 9 Science Chapter 5 The Fundamental Unit of Life - Free PDF Download

Reliable NCERT Solutions for the Fundamental Unit of Life Class 9 PDF is available on Vedantu. Students can download this PDF of NCERT Solutions for free of cost. These NCERT Solutions are prepared by the subject-matter experts at Vedantu who offer detailed explanation and analysis of every topic and exercises which are framed strictly adhering to the updated CBSE syllabus. Hence by following the NCERT Solution for Class 9 Chapter 5, students will be able to learn and understand the crucial concepts covered in the chapter.


Fundamental Unit Of Life Class 9 NCERT Solutions

Listed below are some examples of NCERT Solution of Class 9th Science Chapter 5 which helps students to learn and get greater insights into the concepts.

NCERT Solutions for Class 9 Science


NCERT Solution of Class 9th Science Chapter 5: Solution 1 &2

The first two answers in this PDF will help students to get a detailed understanding of basic concepts like how the cell was developed by Robert Hooke. Furthermore, it also elaborately briefs on why is the cell called the functional and structural unit of life. By learning these two answers students will be able to easily answer the MCQ questions.

Class 9 Fundamental Unit of Life: Solution 3 & 4

NCERT Class 9 fundamental unit of answer 3 describes the scientific process of diffusion and osmosis that helps substances like carbon dioxide and water to move in and out of the cell, respectively. In this solution, both the processes are discussed in detail so that students can grasp the concepts better.

Similarly, NCERT Solution for Class 9 Chapter 5  solution 4 discusses the plasma membrane and the reason as to why it is selectively permeable. It helps to understand the basics of the chapter in greater depth.


NCERT Solution Class 9 Science Chapter 5: Solution 5

Ch 5 science class 9 Chapter 5 solution number 5 explains the difference between Prokaryotic cell and Eukaryotic cell. Each difference is elaborated in a pointwise manner with respect to size, the position of nucleus, number of chromosomes, and membrane. By going through this solution, a student can distinctly understand the structural and functional differences between the two types of cells.


Marks Weightage of Chapter 5 Science Class 9

Chapter 5 is covered in “Organization in the living world” which is unit 2 of the Class 9 Science syllabus. This unit comprises a considerable weightage of 26 marks out of 80. 

In this regard, students should minutely focus on studying the intricacies of this chapter so that they can attempt all short and long answer questions properly during their exams.


Benefits of NCERT Solution for Class 9 Chapter 5 PDF 

There are several ways in which the PDF of Class 9 Fundamental Unit of Life NCERT Solutions are beneficial.

  • Detailed solution for long answer type questions

  • Elaborate examples and relevant diagrams

  • Solved exercises to learn MCQs better

  • Curated by expert science teachers

  • Updated to the latest CBSE syllabus

All these factors ensure that students can adequately understand each topic in detail and therefore have a better learning experience.

FAQs (Frequently Asked Questions)

1. What is meant by Osmosis and Diffusion?

Ans. Osmosis is a process through which water moves in and out of the cell membrane. The movement is always from a region of higher concentration to lower concentration of water through a selectively permeable membrane until it reaches an equilibrium.

In a similar manner, diffusion refers to the process by which Carbon Dioxide moves in and out of the cell membrane. The cellular wall contains a high level of CO2, whereas the CO2 concentration outside is significantly low. This causes the CO2 to move from a region of higher concentration to that of low concentration to maintain a level of equilibrium.

2. What are the important topics in the Fundamental Unit of Life?

Ans. The important topics that students must learn in the chapter fundamental unit of life are – Discovery of the cell, Unicellular organism, Multi-cellular organism, characteristics of the cell, structural organization of cell-like plasma membrane, nucleus, and cytoplasm, DNA, Chromatin material, Chromosomes, and proteins.

Apart from this, students must also focus on topics like Mitochondria, Plastids, lysosomes, chloroplast, leucoplast, vacuoles, Golgi apparatus, Ribosomes, Endoplasmic reticulum, and Cell organelles. Students should focus on learning the topics extensively. Diagrams of every structure and its parts should be learned in detail to answer MCQ, long answer and questions based on diagrams.

3. What is the difference between Prokaryotic and Eukaryotic cells?

Ans. There are four main differences between Prokaryotic and Eukaryotic cells, which are largely related to their structures and size.

The prokaryotic cells are smaller in size, whereas the Eukaryotic cells are generally larger. The nuclear region of the prokaryotic cell is known as nucleoid and lacks a nuclear membrane. In comparison, the Eukaryotic cell has a well defined nuclear membrane. The prokaryotic cell consists of a single chromosome, while the Eukaryotic cell has multiple chromosomes. In a prokaryotic cell, the membrane-bound cell organelles are absent, whereas in the eukaryotic cell the membrane-bound cell organelles are present. 

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