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Q. No.In some prokaryotes like cyanobacteria, there are membranous extensions into the cytoplasm which contain pigments and are called:
1. Mesosomes
2. Gas vacuoles
3. Inclusion bodies
4. Chromatophores
1. Mesosomes
2. Gas vacuoles
3. Inclusion bodies
4. Chromatophores
Subtopic: Details of Prokaryotic Cell Structure | Cell Wall |
84%
From NCERT
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The lipid content of the cell membrane mainly consists of:
| 1. | Phosphoglycerides | 2. | Cholesterol |
| 3. | Unsaturated fatty acids | 4. | Lipopolysaccharides |
Subtopic: Cell Wall |
75%
From NCERT
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The component molecules of the cell membrane have two main parts, the head and the tail. These parts are either hydrophobic (repelled by water) or hydrophilic (attracted to water). Which is which?
| 1. | Hydrophilic Head and Hydrophobic Tail |
| 2. | Both Hydrophobic |
| 3. | Hydrophilic Tail and Hydrophobic Head |
| 4. | Both Hydrophilic |
Subtopic: Cell Wall |
84%
From NCERT
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Mannans, Xylans, Alginic acid and sulfonated polysaccharides are seen in the cell walls of:
| 1. Algae | 2. Archaebacteria |
| 3. Fungi | 4. Plants |
Subtopic: Cell Wall |
80%
From NCERT
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In the given diagram, the plasma membrane, primary cell wall, secondary cell wall and the middle lamella are shown respectively by:
| 1. D, B, C and A | 2. D, C, B and A |
| 3. D, A, B and C | 4. A, B, C and D |
Subtopic: Cell Wall |
64%
From NCERT
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How many of the given statements regarding cell wall are true?
1. 2
2. 3
3. 4
4. 5
| I: | A non-living rigid structure called the cell wall forms an outer covering for the plasma membrane of fungi and plants. |
| II: | Cell wall not only gives shape to the cell and protects the cell from mechanical damage and infection, it also helps in cell-to-cell interaction and provides barrier to undesirable macromolecules. |
| III: | Algae have cell wall, made of cellulose, galactans, mannans and minerals like calcium carbonate, while in other plants it consists of cellulose, hemicellulose, pectins and proteins. |
| IV: | The cell wall of a young plant cell, the primary wall is capable of growth. |
| V: | The secondary wall is formed on the outer (towards middle lamella) side of the cell. |
2. 3
3. 4
4. 5
Subtopic: Cell Wall |
63%
From NCERT
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The middle lamella of a typical plant cell:
| I: | mainly consists of calcium carbonate |
| II: | holds or glues the different neighbouring cells together |
| III: | is not traversed by plasmodesmata |
| 1. | Only II is correct |
| 2. | Only I is incorrect |
| 3. | I, II and III are incorrect |
| 4. | Only II and III are correct |
Subtopic: Cell Wall |
66%
From NCERT
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Identify the incorrect statement regarding the cell wall of a plant cell:
| 1. | Cell wall helps in cell-to-cell interaction and provides barrier to undesirable macromolecules. |
| 2. | Cell wall consists of cellulose, hemicellulose, pectins and proteins. |
| 3. | The primary wall is capable of growth. |
| 4. | The secondary wall is formed on the outer (towards middle lamella) side of the cell. |
Subtopic: Eukaryotic Cell Orgenelle | Cell Wall |
84%
From NCERT
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