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 |
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1. | Robert Brown | 2. | Robert Hooke |
3. | Flemming | 4. | Rudolph Virchow |
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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 |
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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 |
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1. metacentric | 2. sub-metacentric |
3. acrocentric | 4. telocentric |
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1. DNA | 2. Basic histones |
3. Non-histone proteins | 4. Polysachharides |
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A. | Anton Von Leeuwenhoek | The first man to witness a live cell under a microscope |
B. | Schleiden and Schwann | Proposed cell theory |
C. | Rudolph Virchow | Proposed spontaneous generation of life |
1. | Only A and B | 2. | Only A and C |
3. | Only B and C | 4. | A, B and C |
I: | 10-20 µm |
II: | 0.2-2.0 µm |
III: | About 10 µm |
IV: | 1-2 µm |
1. | Only I and III | 2. | Only I and IV |
3. | Only II and III | 4. | Only I, II and IV |
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A: | Fimbriae | B: | Cell wall |
C: | Mesosome | D: | Plastid |
1. | Only A and B | 2. | Only B and D |
3. | Only B and C | 4. | Only A and D |
I: | It shows a polysome. |
II: | All ribosomes will be translating the same protein. |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |