NCERT Solutions for Class 9 Science Chapter 5 Free PDF Download

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

NCERT Solutions for Class 9 Science Chapter 5 provide all the needed knowledge in the simplest and lucid manner. We also facilitate you with an authentic solution to the chapter which is easily available in pdf format. Toppr also offers NCERT Solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life as per latest chapter wise notes for quick preparation of CBSE exams and school-based annual exams.

NCERT Solutions describe all about information related to cell and its structure in a detailed manner. So students will get a step-by-step Concept of The fundamental organizational unit of life which is cell. You will find the solution of exercise questions, important for your main exams.

NCERT Solutions for The Fundamental Unit of Life are very useful to grasp the concept with practical exposure and will prepare a strong base for the CBSE board exam.

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

NCERT Solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life is the step towards the world of anatomy. This chapter is about basic knowledge of a cell which is the smallest unit of life. Students will know about to define three basic parts to a cell such as a cell membrane, nucleus, and cytoplasm. Students will get to know about the structure and specify the functions of each cell part.

Sub topics covered under NCERT Solutions for Class 9 Science Chapter 5

• 5.1: What are Living Organisms Made Up of?
• 5.2: What is a Cell Made Up of? What is the Structural Organisation of a Cell?
• 5.2.1: Plasma Membrane or Cell Membrane
• 5.2.2: Cell Wall
• 5.2.3: Nucleus
• 5.2.4: Cytoplasm
• 5.2.5: Cell Organelles
• 5.2.5  (i) Endoplasmic Reticulum (ER)
• 5.2.5  (ii) Golgi Apparatus
• 5.2.5  (iii) Lysosomes
• 5.2.5  (iv) Mitochondria
• 5.2.5  (v) Plastids
• 5.2.5 (vi) Vacuoles

NCERT Solutions for Class 9 Science Chapter 5

Cells are the root building blocks of all living things. The human body is having trillions of cells, which provide structure for the body. They help to take nutrients from food, convert those nutrients into energy, and carry out functions. Cells also contain the body’s hereditary material and can make copies also. NCERT Solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life is a concept-oriented solution in the elaborating method.

Let us discuss the sub-topics in detail.

5.1: What are Living Organisms Made Up of?

The fundamental and organizational unit of life is the cell.

5.2: What is a Cell Made Up of? What is the Structural Organisation of a Cell?

Plasma membrane composed of lipids and proteins covers the cells.

5.2.1: Plasma Membrane or Cell Membrane:

The cell membrane is a very active part of the cell. It handles the movement of materials between the ordered interior of the cell and the outer environment.

5.2.2: Cell Wall:

In the plant cells, a cell wall is comprising of mainly of cellulose is located outside the cell membrane.

5.2.3: Nucleus:

The nucleus serves as the cell’s control center and sends directions to the cell to grow, mature, divide, or die. It also contains DNA the cell’s hereditary material. Nuclear envelope membrane encloses the nucleus. It protects the DNA and separates the nucleus from the rest of the cell.

5.2.4: Cytoplasm:

Within cells, the cytoplasm is made up of a jelly-like fluid which is called cytosol and other structures that surround the nucleus.

5.2.5: Cell Organelles:

Every cell has a membrane to keep itself separate from the surroundings. Large cells need a lot of chemical activities for supporting their complicated structure and function.

5.2.5  (i) Endoplasmic Reticulum (ER):

This organelle supports process molecules created by the cell. The endoplasmic reticulum also transports these molecules to their destinations may be inside or outside the cell.

5.2.5 (ii) Golgi Apparatus:

The Golgi apparatus molecules processed by the endoplasmic reticulum to be transported out of the cell.

5.2.5 (iii) Lysosomes:

These organelles are working as the recycling center of the cell. They digest foreign bacteria invading the cell, rid the cell of toxic substances.

5.2.5 (iv) Mitochondria:

It is a complex organ cell that converts energy from food into a form that the cell can use. They have their own genetic material other than DNA in the nucleus.

5.2.5 (v) Plastids:

Plastids are present only in plant cells.

5.2.5 (vi) Vacuoles:

Vacuoles are storage for solid or liquid contents.

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