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Q3:
Match the following
Column I Column II
(a) Cristae (i) Flat membranous sacs in stroma
(b) Cisternae (ii) Infoldings in mitochondria
(c) Thylakoids (iii) Disc-shaped sacs in Golgi apparatus
Match the following
Column I Column II
(a) Cristae (i) Flat membranous sacs in stroma
(b) Cisternae (ii) Infoldings in mitochondria
(c) Thylakoids (iii) Disc-shaped sacs in Golgi apparatus
Solution :
Step 1: Analyzing Column I Terminology
To establish the correct associations, we must define the anatomical function and cellular location of the structures provided in Column I:
- (a) Cristae: These are the characteristic inward foldings of the inner mitochondrial membrane [Per the Chemiosmotic Theory of ATP synthesis, these folds increase surface area for electron transport chain complexes].
- (b) Cisternae: These represent the flattened, sac-like structures found within the Golgi apparatus [By the secretory pathway model, cisternae are responsible for the modification, sorting, and packaging of proteins].
- (c) Thylakoids: These are membrane-bound, coin-shaped compartments found within the chloroplasts, organized into stacks called grana [By the light-dependent reaction mechanism, the thylakoid membrane contains pigments like chlorophyll essential for photon capture].
Step 2: Logical Mapping and Coordination
We correlate the definitions above with the descriptions provided in Column II:
| Column I | Column II | Biological Justification |
|---|---|---|
| (a) Cristae | (ii) Infoldings in mitochondria | The inner membrane invaginates to form cristae, maximizing space for respiratory enzymes. |
| (b) Cisternae | (iii) Disc-shaped sacs in Golgi apparatus | The Golgi apparatus consists of a series of stacked, flattened pouches called cisternae. |
| (c) Thylakoids | (i) Flat membranous sacs in stroma | These internal membrane systems are suspended within the stroma of the chloroplast. |
Step 3: Visual Representation of Cellular Structures
Final Solution: The correct matching sequence is:
- (a) — (ii)
- (b) — (iii)
- (c) — (i)
More Questions from Class 11 Biology Cell – The Unit of Life EXERCISES
- Q1: Which of the following is not correct?
- Q2: New cells generate from
- Q4: Which of the following is correct:
- Q5: What is a mesosome in a prokaryotic cell? Mention the functions that it performs.
- Q6: How do neutral solutes move across the plasma membrane? Can the polar molecules also move across it in the same way? If not, then how are these transported across the membrane?
- Q7: Name two cell-organelles that are double membrane bound. What are the characteristics of these two organelles? State their functions and draw labelled diagrams of both.
- Q8: What are the characteristics of prokaryotic cells?
- Q9: Multicellular organisms have division of labour. Explain.
- Q10: Cell is the basic unit of life. Discuss in brief.
- Q11: What are nuclear pores? State their function.
- Q12: Both lysosomes and vacuoles are endomembrane structures, yet they differ in terms of their functions. Comment.
- Q13(i): Describe the structure of the following with the help of labelled diagrams. (i) Nucleus
- Q13(ii): Describe the structure of the following with the help of labelled diagrams. (ii) Centrosome
- Q14: What is a centromere? How does the position of centromere form the basis of classification of chromosomes. Support your answer with a diagram showing the position of centromere on different types of chromosomes.
CBSE Solutions for Class 11 Biology Cell – The Unit of Life
Chapters in CBSE - Class 11 Biology
- The Living World
- Biological Classification
- Plant Kingdom
- Animal Kingdom
- Morphology of Flowering Plants
- Anatomy of Flowering Plants
- Structural Organisation in Animals
- Biomolecules
- Cell Cycle and Division
- Transport in Plants
- Mineral Nutrition
- Photosynthesis
- Respiration in Plants
- Plant Growth and Development
- Digestion and Absorption
- Breathing and Exchange of Gases
- Body Fluids and Circulation
- Excretory Products and Elimination
- Locomotion and Movement
- Neural Control and Coordination
- Chemical Coordination and Integration
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