The number of correct statements amongst the given statements would be:
I: | The outer nuclear membrane is usually continuous with ER and also bears ribosomes |
II: | Nuclear pores allow movement of RNA and proteins in both directions between nucleus and cytoplasm |
III: | Satellite chromosomes have non-staining secondary constrictions at constant locations |
IV: | Microbodies are membrane bound vesicles containing various enzymes and are present in both plant and animal cells |
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
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A common characteristic feature of plant sieve tube cells and most of mammalian erythrocytes is
1. | Absence of mitochondria | 2. | Presence of cell wall |
3. | Presence of haemoglobin | 4. | Absence of nucleus |
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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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