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Q. No.Consider the given two statements:
Statement I:
The approximate percent composition of proteins and lipids in the cell membrane of a human erythrocyte is respectively 40% and 52%.
Statement II:
The measure of fluidity of a cell membrane is the ability of proteins to flip-flop between the two layers of phospholipid.
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.
Subtopic: Evidence for Fluidic Nature of Membrane |
From NCERT
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The quasi-fluid nature of the cell membrane is primarily because of
1. Phospholipids
2. Cholesterol
3. Carbohydrates
4. Proteins.
1. Phospholipids
2. Cholesterol
3. Carbohydrates
4. Proteins.
Subtopic: Evidence for Fluidic Nature of Membrane |
89%
From NCERT
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What are chromatophores in prokaryotic cells?
| 1. | Lipopolysaccharide layer of gram negative bacteria |
| 2. | Colored pigments in fluorescent bacteria |
| 3. | Carbon concentrating compartments in photosynthetic bacteria |
| 4. | Membrane-bound vesicles containing photosynthetic pigments |
Subtopic: Prokaryotic Cell Organisation | Details of Prokaryotic Cell Structure |
70%
From NCERT
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Which of the following functions is associated with the Rough Endoplasmic Reticulum (RER)?
1. Synthesis of steroid hormones
2. Detoxification of drugs and poisons
3. Synthesis of proteins destined for secretion
4. Storage of calcium ions
1. Synthesis of steroid hormones
2. Detoxification of drugs and poisons
3. Synthesis of proteins destined for secretion
4. Storage of calcium ions
Subtopic: Endomembrane System (Endoplasmic Reticulum) |
91%
From NCERT
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What is the primary function of the nucleolus found within the nucleus?
| 1. | It is the site of ribosome assembly. |
| 2. | It serves as the storage area for DNA. |
| 3. | It is responsible for the synthesis of lipids. |
| 4. | It plays a role in cell division. |
Subtopic: Nucleus |
75%
From NCERT
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Which of the following is not a part of the cell theory?
1. Only I and II
2. Only III
3. Only I
4. I, II and III
| I. | All living organisms are composed of cells. |
| II. | The cell is the basic unit of life. |
| III. | All cells come from pre-existing cells through sexual reproduction. |
1. Only I and II
2. Only III
3. Only I
4. I, II and III
Subtopic: Cell Theory |
72%
From NCERT
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Match the following organelles with their functions:
1. 1-D, 2-B, 3-A, 4-C
2. 1-C, 2-D, 3-B, 4-A
3. 1-B, 2-A, 3-D, 4-C
4. 1-B, 2-C, 3-A, 4-D
| Column I | Column II | ||
| 1. | Chloroplast | A. | Protein synthesis |
| 2. | Peroxisome | B. | Photosynthesis |
| 3. | Nucleolus | C. | Detoxification |
| 4. | Centrosome | D. | Cell division |
1. 1-D, 2-B, 3-A, 4-C
2. 1-C, 2-D, 3-B, 4-A
3. 1-B, 2-A, 3-D, 4-C
4. 1-B, 2-C, 3-A, 4-D
Subtopic: Eukaryotic Cell Orgenelle |
93%
From NCERT
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The primary function of the cell wall in plant cells is to:
1. control the entry and exit of substances
2. provide structural support and protection
3. conduct photosynthesis
4. store genetic information
1. control the entry and exit of substances
2. provide structural support and protection
3. conduct photosynthesis
4. store genetic information
Subtopic: Cell Wall |
96%
From NCERT
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What role does the cell membrane play in maintaining homeostasis within animal cells?
| 1. | It synthesizes proteins that regulate cellular functions. |
| 2. | It selectively allows substances to enter and exit the cell, maintaining the internal environment. |
| 3. | It provides structural support to maintain the shape and integrity of the cell. |
| 4. | It stores genetic material and coordinates cell division. |
Subtopic: Cell Membrane |
89%
From NCERT
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Carotenoid pigments like carotene and xanthophylls:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | are present on chromoplasts. |
| II: | are not lipid soluble. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Plastids |
68%
From NCERT
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