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Q. No.Identify the incorrect statement regarding centrosome:
1.
it usually contains two cylindrical structures called centrioles
2.
both centrioles in centrosome are parallel to each other
3.
in centrioles, the peripheral fibril is a triplet
4.
the central part of the proximal region of the centriole is a proteinaceous hub
Subtopic: Centrosomes |
83%
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Consider the two statements:
| I: | The content of nucleolus is continuous with the rest of the nucleoplasm. |
| II: | Nucleolus is the site for active ribosomal RNA synthesis. |
| 1. | I is correct and II is incorrect |
| 2. | Both I and II are correct but II does not explain I |
| 3. | Both I and II are correct and II correctly explains I |
| 4. | Only II is correct |
Subtopic: Nucleus |
79%
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Identify the incorrect statement:
| I: | Nuclear envelope consists of two parallel membranes with a perinuclear space between them. |
| II: | Nuclear pore is formed by the fusion of two nuclear membranes at points where they interrupt the nuclear envelope. |
| III: | Large and more numerous nucleoli are present in the cells actively carrying out protein synthesis. |
| 1. Only I | 2. Only II |
| 3. Only III | 4. None |
Subtopic: Nucleus |
60%
From NCERT
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The type of chromosome not shown in the figure given below will be:
| 1. metacentric | 2. sub-metacentric |
| 3. acrocentric | 4. telocentric |
Subtopic: Nucleus: Chromosomes |
67%
From NCERT
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The prokaryotic cells:
| 1. | do not possess flagella |
| 2. | possess flagella that are structurally similar to that of the eukaryotic flagella |
| 3. | possess flagella that are structurally different from that of the eukaryotic flagella |
| 4. | possess flagella made of tubulin protein and microtubules |
Subtopic: Eukaryotic Cell Orgenelle |
75%
From NCERT
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The given diagram:
1. Both I and II are correct
2. only I is correct
3. only II is correct
4. Both I and II are incorrect
| I: | shows the diagrammatic representation of the ultra-structure of centriole |
| II: | shows the 9 + 2 arrangement of the axonemal microtubules of cilia/flagella |
2. only I is correct
3. only II is correct
4. Both I and II are incorrect
Subtopic: Cilia & Flagella |
66%
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George Palade was the first scientist to observe:
| 1. | Lysosome | 2. | Peroxisome |
| 3. | Ribosome | 4. | Mesosome |
Subtopic: Ribosome and Inclusion Bodies |
90%
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Identify the incorrect statement regarding mitochondria:
| 1. | The number of mitochondria per cell is same in all the cells of human body. |
| 2. | The inner membrane forms a number of infoldings called the cristae towards the matrix. |
| 3. | They divide by binary fission. |
| 4. | They are called as ‘power houses’ of the cell. |
Subtopic: Mitochondria |
91%
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The endoplasmic reticulum:
1. both I and II are correct
2. only I is correct
3. only II is correct
4. Both I and II are incorrect
| I: | divides the intracellular space into a luminal compartment and an extra-luminal [cytoplasm] compartment. |
| II: | is called as rough ER if it shows ribosomes attached to its inner surface. |
2. only I is correct
3. only II is correct
4. Both I and II are incorrect
Subtopic: Endomembrane System (Endoplasmic Reticulum) |
61%
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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 |
68%
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