NCERT Solutions for Class 11 Biology Chapter 8 - Cell: The Unit of Life

 

NCERT Solutions for Class 11 Biology Chapter 8 - Cell: The Unit of Life: When you look around, you see both living and non-living things. You must have wondered and asked yourself – ‘what is it that makes an organism living, or what is it that an inanimate thing does not have which a living thing has’ ? The answer to this is the presence of the basic unit of life – the cell in all living organisms. All organisms are composed of cells. Some are composed of a single cell and are called unicellular organisms while others, like us, composed of many cells, are called multicellular organisms.

A typical eukaryotic cell consists of a cell membrane, nucleus and cytoplasm. Plant cells have a cell wall outside the cell membrane. The plasma membrane is selectively permeable and facilitates the transport of several molecules. The endomembrane system includes ER, Golgi complex, lysosomes and vacuoles. All the cell organelles perform different but specific functions.

Here the important topics of Class 11 Biology Chapter 8 - Cell: The Unit of Life are mentioned below:

8.1 What is a Cell?

8.2 Cell Theory

8.3 An Overview of Cell

8.4 Prokaryotic Cells

    8.4.1 Cell Envelope and its Modifications

    8.4.2 Ribosomes and Inclusion Bodies

8.5 Eukaryotic Cells

    8.5.1 Cell Membrane

    8.5.2 Cell Wall

    8.5.3 Endomembrane System

        8.5.3.1 The Endoplasmic Reticulum (ER)

        8.5.3.2 Golgi apparatus

        8.5.3.3 Lysosomes

        8.5.3.4 Vacuoles

    8.5.4 Mitochondria

    8.5.5 Plastids

    8.5.6 Ribosomes

    8.5.7 Cytoskeleton

    8.5.8 Cilia and Flagella

    8.5.9 Centrosome and Centrioles

    8.5.10 Nucleus

    8.5.11 Microbodies

They are of two types: rough and smooth. ER helps in the transport of substances, synthesis of proteins, lipoproteins, and glycogen. The Golgi body is a membranous organelle composed of flattened sacs. The secretions of cells are packed in them and transported from the cell. Lysosomes are single membrane structures containing enzymes for digestion of all types of macromolecules. Ribosomes are involved in protein synthesis. These occur freely in the cytoplasm or are associated with ER. Mitochondria help in oxidative phosphorylation and generation of adenosine triphosphate.

After going through NCERT Class 11 Biology Chapter 8 - Cell: The Unit of Life, you must be able to answer the following questions:

  • Q1. Both lysosomes and vacuoles are endomembrane structures, yet they differ in terms of their functions. Comment.
  • Q2.  Describe the structure of the following with the help of labelled diagrams.
    • (i) Nucleus
    • (ii) Centrosome
  • Q3. What is centromere? How does the position of centromere form the basis of the classification of chromosomes? Support your answer with a diagram showing the position of the centromere on different types of chromosomes.

If you have any query in answering these questions which are mentioned in the above then, NCERT Solutions for Class 11 Biology Chapter 8 - Cell: The Unit of Life will help you to answer them by understanding the concept behind it.

Also, try to solve all the questions which are mentioned in the NCERT, as NCERT is the base of your knowledge. Take help from Solutions for NCERT Class 11 Biology Chapter 8 - Cell: The Unit of Life, this will help you not only for your school exam as it will also help you in the preparation of other competitive exams like NEET and AIIMs.

NCERT Solutions for Class 11 Biology Chapter 8 Cell: The Unit of Life - Solved Exercise Questions

NCERT Solutions for class 11 Biology

Chapter-1

The Living World

Chapter-2

Biological Classification

Chapter-3

Plant Kingdom

Chapter-4

Animal Kingdom

Chapter-5

Morphology of Flowering Plants

Chapter-6

Anatomy of Flowering Plants

Chapter-7

Structural Organisation in Animals

Chapter-9

Biomolecules

Chapter-10

Cell Cycle and Cell Division

Chapter-11

Transport in Plants

Chapter-12

Mineral Nutrition

Chapter-13

Photosynthesis in Higher Plants

Chapter-14

Respiration in Plants

Chapter-15

Plant Growth and Development

Chapter-16

Digestion and Absorption

Chapter-17

Breathing and Exchange of Gases

Chapter-18

Body Fluids and Circulation

Chapter-19

Excretory Products and their Elimination

Chapter-20

Locomotion and Movement

Chapter-21

Neural Control and Coordination

Chapter-22

Chemical Coordination and Integration

NCERT Solutions for Class 11- Subject wise

NCERT solutions for Class 11 Biology

NCERT solutions for Class 11 Maths

NCERT solutions for Class 11 Chemistry

NCERT solutions for Class 11 Physics

 

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