Identify the incorrect statement regarding nucleolus:
1. | Their content is continuous with nucleoplasm |
2. | It is site for active rRNA synthesis |
3. | Their number is always one per nucleus |
4. | Larger nucleoli are present in cells actively carrying out protein synthesis |
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When the centromere in a chromosome is located close to its end, the chromosome is called as:
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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Consider the following two statements:
I: | Secondary constrictions can be used as markers to identify the particular SAT chromosomes. |
II: | The secondary constrictions are always constant in their positions. |
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct and II is incorrect
4. Both I and II are incorrect
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1. | Type A | 2. | Type B |
3. | Type C | 4. | Type D |
1. metacentric | 2. sub-metacentric |
3. acrocentric | 4. telocentric |
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I: | A | Sister chromatids |
II: | B | Q arm of the chromosome |
III: | C | Centromere |
IV: | D | P arm of the chromosome |
1. | Only I and II | 2. | Only II and IV |
3. | Only I and III | 4. | Only I |