- 1(current)
Q. No.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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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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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(current)
Q. No.
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