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Chapters
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 8: Cell : the Unit of Life
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
Chapter 8: Cell : the Unit of Life
NCERT solutions for Biology Exemplar class 11 Chapter 8 Cell : the Unit of Life Exercises [Pages 38 - 42]
MULTIPLE CHOICE QUESTIONS
A common characteristic feature of plant sieve tube cells and most of mammalian erythrocytes is ______.
Absence of mitochondria
Presence of cell wall
Presence of haemoglobin
Absence of nucleus
Select one which is not true for ribosome.
Made of two sub-units
Form polysome
May attach to m+RNA
Have no role in protien synthesis
Which one of these is not a eukaryote?
Euglena
Anabena
Spirogyra
Agaricus
Which of the following stains is not used for staining chromosomes?
Basic Fuchsin
Safranin
Methylene green
Carmine
Different cells have different sizes. Arrange the following cells in an ascending order of their size. Choose the correct option among the followings.
- Mycoplasma
- Ostrich eggs
- Human RBC
- Bacteria
i, iv, iii and ii
i, iii, iv and ii
ii, i, iii and iv
iii, ii, i and iv
Which of the following features is common to prokaryotes and many eukaryotes?
Chromatin material
Cell wall present
Nuclear membrane present
Membranes bound sub-cellular organelles present
Who proposed the fluid mosaic model of plasma membrane?
Benda
Schleiden and Schwann
Singer and Nicolson
Robert Brown
Which of the following statements is true for a secretory cell?
Golgi apparatus is absent
Rough Endoplasmic Reticulum (RER) is easily observed in the cell
Only Smooth Endoplasmic Reticulum (SER) is present
Secretory granules are formed in nucleus
What is a tonoplast?
Outer membrane of mitochondria
Inner membrane of chloroplast
Membrane boundary of the vacuole of plant cells
Cell membrane of a plant cell
Which of the following is not true of a eukaryotic cell?
Cell wall is made up of peptidoglycans
80S type of ribosomes are present in the cytoplasm
Mitochondria contain circular DNA
Membrane bound organelles are present
Which of the following statements is not true for plasma membrane?
It is present in both plant and animal cell
Lipid is present as a bilayer in it
Proteins are present integrated as well as loosely associated with the lipid bilayer
Carbohydrate is never found in it
Plastid differs from mitochondria on the basis of one of the following features. Mark the right answer.
Presence of two layers of membrane
Presence of ribosome
Presence of thylakoids
Presence of DNA
Which of the following is not a function of cytoskeleton in a cell?
Intracellular transport
Maintenance of cell shape and structure
Support of the organelle
Cell Motility
The stain used to visualise motochondria is ______.
Fast green
Safranin
Acetocarmine
Janus green
VERY SHORT ANSWER TYPE QUESTIONS
What is the significance of vacuole in a plant cell?
What does ‘S’ refer in a 70S and an 80S ribosome?
Mention a single membrane bound organelle which is rich in hydrolytic enzymes.
What are gas vacuoles? State their functions?
What is the function of a polysome?
What is the feature of a metacentric chromosome?
What is refer-ed to as satellite chromosome?
SHORT ANSWER TYPE QUESTIONS
Discuss briefly the role of nucleolus in the cells actively involved in protein synthesis.
Explain the association of carbohydrate to the plasma membrane and its significance.
Comment on the cartwheel structure of centriole.
Briefly describe the cell theory.
Differentiate between Rough Endoplasmic Reticulum (RER) and Smooth Endoplasmic Reticulum (SER).
Give the biochemical composition of plasma membrane. How are lipid molecules arranged in the membrane?
What are plasmids? Describe their role in bacteria?
What are plasmids? Describe their role in bacteria?
What are histones? What are their functions?
LONG ANSWER TYPE QUESTIONS
What structural and functional attributes must a cell have to be called a living cell?
Briefly give the contributions of the following scientists in formulating the cell theory
- Robert Virchow
- Schielden and Schwann
Is extra genomic DNA present in prokaryotes and eukaryotes? If yes, indicate their location in both the types of organisms.
Structure and function are correlatable in living organisms. Can you justify this by taking plasma membrane as an example?
Eukaryotic cells have organelles which may
- not be bound by a membrane
- bound by a single membrane
- bound by a double membrane
Group the various sub-cellular organelles into these three categories.
The genomic content of the nucleus is constant for a given species where as the extra chromosomal DNA is found to be variable among the members of a population. Explain.
Justify the statement, “Mitochondria are power houses of the cell”
Is there a species specific or region specific type of plastids? How does one distinguish one from the other?
Write the function of the following:
Centromere
Write the function of the following:
Cell wall
Write the function of the following:
Smooth ER
Write the function of the following:
Golgi Apparatus
Write the function of the following:
Centrioles
Are the different types of plastids interchangeable? If yes, give examples where they are getting converted from one type to another.
Chapter 8: Cell : the Unit of Life
NCERT solutions for Biology Exemplar class 11 chapter 8 - Cell : the Unit of Life
NCERT solutions for Biology Exemplar class 11 chapter 8 (Cell : the 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 Biology Exemplar class 11 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 Biology Exemplar class 11 chapter 8 Cell : the Unit of Life are Cell Theory, Structure of Prokaryotic and Eukaryotic Cells, Endomembrane System, Mitochondria, Plastids, Ribosomes, Cilia and Flagella, Centrosome and Centrioles, Cytoskeleton, Nucleus, Microbodies, Plant Cell and Animal Cell, Overview of Cell, Prokaryotic Cells, Cell Envelope and Its Modifications, Ribosomes and Inclusion Bodies, Cell Membrane, Cell Wall, Cell: the Fundamental Unit of Life, The Invention of the Microscope and the Discovery of Cell, Organisms Show Variety in Cell Number, Shape and Size, Structure and Functions of Cell Envelope, Cell Membrane, Cell Wall, Cell Organelles.
Using NCERT Class 11 solutions Cell : the 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 11 prefer NCERT Textbook Solutions to score more in exam.
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