Q. No.Disc-shaped proteinaceous structure associated with centromere is called
| 1. | Kinetochore |
| 2. | Secondary constriction |
| 3. | Both Primary and Secondary constriction |
| 4. | Nucleolar organizer |
Which of the following organelles contain DNA?
| (i) | Mitochondria |
| (ii) | Chloroplasts |
| (iii) | Golgi bodies |
| (iv) | Ribosomes |
1. (i) and (ii)
2. (ii) and (iii)
3. (i) only
4. (iv) only.
Which of the following is true about chromosome
1. nucleoprotein
2. 23 pairs in single human diploid cell
3. Contains primary constriction
4. All of these
Few chromosome have non-staining secondary constrictions at a constant location, also known as :-
1. Cristae
2. Satellite
3. Kinetochores
4. Hub
Match the columns and identify the correct option.
| Column I | Column II | ||
| A. | Thylakoids | (i) | Disc-shaped sacs in Golgi apparatus |
| B. | Cristae | (ii) | Condensed structure of DNA |
| C. | Cisternae | (iii) | Flat membranous sacs in stroma |
| D. | Chromatin | (iv) | Infolding in mitochondria |
1. A → (iv), B → (iii), C → (i), D → (ii)
2. A → (iii), B → (iv), C → (i), D → (ii)
3. A → (iii), B → (i), C → (iv), D → (ii)
4. A → (iii), B → (iv), C → (ii), D → (i)
A chromosome carrying the centromere at one of the ends is called
1. acentric
2. submetacentric
3. telocentric
4. metacentric.
Chromatin contains
| 1. | DNA, histone protein, basic non-histone protein, dsRNA |
| 2. | DNA, basic histone protein, non-histone protein, RNA |
| 3. | DNA, acidic histone protein, basic non-histone protein, RNA |
| 4. | DNA, acidic histone protein, non-histone protein, dsRNA |
Select the correct match:
| 1. | 70 'S' ribosome | Bacterial mesosome |
| 2. | Cytoskeleton | Lipoproteins |
| 3. | Kinetochore | Centromere |
| 4. | Lysosome | Catalase |
The chromosomes in which centromere is situated close to one end are
1. metacentric
2. acrocentric
3. telocentric
4. sub-metacentric
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