Q. No.All the following are located in the mitochondrial matrix except:
1. Single circular DNA molecule
2. Proteins of electron transport chain
3. 70 S ribosomes
4. Enzymes of Kreb’s cycle
1. Single circular DNA molecule
2. Proteins of electron transport chain
3. 70 S ribosomes
4. Enzymes of Kreb’s cycle
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The types of plastids that store oils and fats are:
| 1. Leucoplasts | 2. Amyloplasts |
| 3. Elaioplasts | 4. Aleuroplasts |
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Identify the incorrect statement regarding chloroplasts:
| 1. | They are double membrane bound organelles |
| 2. | Inner chloroplast membrane is relatively more permeable |
| 3. | Chlorophyll pigments are present in the thylakoids |
| 4. | Stroma contains enzymes required for synthesis of carbohydrates and proteins |
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What is true regarding the structure of ribosomes?
| 1. | They are made of rRNA and proteins and are enclosed by a single membrane |
| 2. | They are made of rRNA and carbohydrates and are enclosed by a single membrane |
| 3. | They are made of rRNA and carbohydrates and are not enclosed by any membrane |
| 4. | They are made of rRNA and proteins and are not enclosed by any membrane |
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The arrangement of axonemal microtubules in cilia and flagella is regarded as:
| 1. | 9 + 0 | 2. | 9 + 1 |
| 3. | 9 + 2 | 4. | 9 + 9 |
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Both cilium and flagellum emerge from centriole-like structure called the:
| 1. | Centrosome | 2. | Centromere |
| 3. | Blepharoplast | 4. | Basal body |
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The given diagram shows the ultra-structure of:
1. Centriole
2. Cilium
3. Flagellum
4. Centrosome
Both mature erythrocytes of humans and mature sieve tube cells of vascular plants:
1. are involved in transport of respiratory gases
2. lack a nucleus
3. continue to divide in an adult organism
4. do not exhibit any metabolism
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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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Nucleoprotein fibers in the interphase nucleus called chromatin contain all the following except:
| 1. | DNA | 2. | Basic histones |
| 3. | RNA | 4. | Acidic histones |
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