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NCERT solutions for Class 9 Science chapter 5 - The Fundamental Unit of Life [Latest edition]

Chapters

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Chapter 5: The Fundamental Unit of Life

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[Page 59]

NCERT solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life [Page 59]

Q 1 | Page 59

Who discovered cells and how?

Q 2 | Page 59

Why is the cell called the structural and functional unit of life?

[Page 61]

NCERT solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life [Page 61]

Q 1 | Page 61

How do substances like CO2 and water move in and out of the cell? Discuss.

Q 2 | Page 61

Why is the plasma membrane called a selectively permeable membrane?

[Page 63]

NCERT solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life [Page 63]

Q 1 | Page 63

Fill in the gaps in the following table illustrating differences between prokaryotic and eukaryotic cells.

  Prokaryotic cell Eukaryotic cell
1. Size: generally small ( 1-10 µm) 1 µm = 10-6 m Size: generally large (5-100 µm)
2. Nuclear region: ______________and is known as____ Nuclear region: well-defined and surrounded by a nuclear membrane
3. Chromosome: single More than one chromosome
4. Membrane-bound cell organelles are absent  _______________________________
[Page 65]

NCERT solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life [Page 65]

Q 1 | Page 65

Can you name the two organelles we have studied that contain their own genetic material?

Q 2 | Page 65

If the organisation of a cell is destroyed due to some physical or chemical influence, what will happen?

Q 3 | Page 65

Why are lysosomes known as suicide bags?

Q 4 | Page 65

Where are proteins synthesized inside the cell?

[Page 67]

NCERT solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life [Page 67]

Q 1 | Page 67

Make a comparison and write down ways in which plant cells are different from animal cells.

Q 2 | Page 67

How is a prokaryotic cell different from a eukaryotic cell?

Q 3 | Page 67

What would happen if the plasma membrane ruptures or breaks down?

Q 4 | Page 67

What would happen to the life of a cell if there was no Golgi apparatus?

Q 5 | Page 67

Which organelle is known as the powerhouse of the cell? Why?

Q 6 | Page 67

Where do the lipids and proteins constituting the cell membrane get synthesized?

Q 7 | Page 67

How does an Amoeba obtain its food?

Q 8 | Page 67

What is osmosis?

Q 9 | Page 67

Carry out the following osmosis experiment:

Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,

(a) Keep cup A empty

(b) Put one teaspoon sugar in cup B

(c) Put one teaspoon salt in cup C

(d) Put one teaspoon sugar in the boiled potato cup D.

Keep these for two hours. Then observe the four potato cups and answer the following:

(i) Explain why water gathers in the hollowed portion of B and C.

(ii) Why is potato A necessary for this experiment?

(iii) Explain why water does not gather in the hollowed out portions of A and D.

Q 10 | Page 67

Which type of cell division is required for growth and repair
of body and which type is involved in formation of gametes?

Chapter 5: The Fundamental Unit of Life

NCERT solutions for Class 9 Science chapter 5 - The Fundamental Unit of Life

NCERT solutions for Class 9 Science chapter 5 (The Fundamental Unit of Life) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Class 9 Science solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 9 Science chapter 5 The Fundamental Unit of Life are Lysosome - “Suicidal Bag”, Structure of a Cell, Plasma Membrane, Cell Wall - “Supporter and Protector”, Nucleus - “Brain” of the Cell, Cytoplasm - “Area of Movement”, Endoplasmic Reticulum (ER), Plastids, The Invention of the Microscope and the Discovery of Cell, Osmotic Pressure, Prokaryotic and Eukaryotic Cell, Concept of Diffusion, Organisms Show Variety in Cell Number, Shape and Size, Cell: the Fundamental Unit of Life, Cell Theory, Concept of Osmosis, Semi-permeable Membrane (Cell Membrane), Golgi Apparatus - "The delivery system of the cell", Mitochondria - “Power House of the Cell”, Non-living Substances Or Cell Inclusion, Plant Cell and Animal Cell, Cell Division: an Essential Life Process.

Using NCERT Class 9 solutions The Fundamental Unit of Life exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in NCERT Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 9 prefer NCERT Textbook Solutions to score more in exam.

Get the free view of chapter 5 The Fundamental Unit of Life Class 9 extra questions for Class 9 Science and can use Shaalaa.com to keep it handy for your exam preparation

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