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 |
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 |
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
| 1. | Type A | 2. | Type B |
| 3. | Type C | 4. | Type D |
| 1. | metacentric | 2. | sub-metacentric |
| 3. | acrocentric | 4. | telocentric |
| 1. | DNA | 2. | Basic histones |
| 3. | Non-histone proteins | 4. | Polysachharides |
| 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 |