NCERT Solutions for Class 9 Science Chapter 5

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

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