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Q. No.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 |
Subtopic: Nucleus: Chromosomes |
76%
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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 |
Subtopic: Nucleus: Chromosomes |
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From NCERT
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Subtopic: Nucleus: Chromosomes |
85%
From NCERT
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What would be true regarding the names of chromosomes described in the given table?
1. A and B only
2. A and C only
3. C and D only
4. B and D only
| I: | Centromere placement very close to the top, p arms not visible |
| II: | q arms are much longer than the p arms. |
| III: | p and q arms are very close in length but not equal. |
| IV: | p and q arms are equal in length. |
| A: | I is Acrocentric and II is Telocentric |
| B: | III is Metacentric and IV is Sub-metacentric |
| C: | I is Telocentroic and II is Acrocentric |
| D: | III is sub-metacentric and IV is Metacentric |
1. A and B only
2. A and C only
3. C and D only
4. B and D only
Subtopic: Nucleus: Chromosomes |
91%
From NCERT
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Sometimes a few chromosomes have non-staining secondary constrictions at a constant location. This gives
the appearance of a small fragment called the:
1. telomere
2. satellite
3. bands
4. chromomere
the appearance of a small fragment called the:
1. telomere
2. satellite
3. bands
4. chromomere
Subtopic: Nucleus: Chromosomes |
96%
From NCERT
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Kinetochore:
| 1. | is not visible in dividing cells. |
| 2. | is also called the primary constriction |
| 3. | is a proteinaceous disc shaped structure on the sides of the centromeres. |
| 4. | holds two chromatids of a chromosome. |
Subtopic: Nucleus: Chromosomes |
88%
From NCERT
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Q. No.
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