Q. No.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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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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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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The number of correct statements amongst the given statements would be:
| I: | The outer nuclear membrane is usually continuous with ER and also bears ribosomes |
| II: | Nuclear pores allow movement of RNA and proteins in both directions between nucleus and cytoplasm |
| III: | Satellite chromosomes have non-staining secondary constrictions at constant locations |
| IV: | Microbodies are membrane bound vesicles containing various enzymes and are present in both plant and animal cells |
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | 4 |
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A common characteristic feature of plant sieve tube cells and most of mammalian erythrocytes is
| 1. | Absence of mitochondria | 2. | Presence of cell wall |
| 3. | Presence of haemoglobin | 4. | Absence of nucleus |
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Which of the following statements is true for a secretory cell?
| 1. | Golgi apparatus is absent |
| 2. | Rough Endoplasmic Reticulum (RER) is easily observed in the cell |
| 3. | Only Smooth Endoplasmic Reticulum (SER) is seen in the cell |
| 4. | Secretary granules are formed in nucleus |
Which of the following statements can explain the fact that many scientists do not consider viruses as living organisms?
| 1. | Metabolism and growth are defining properties of living organisms. |
| 2. | Anything less than a complete structure of a cell does not ensure independent living. |
| 3. | All cells arise from pre-existing cells. |
| 4. | All biochemical reactions are catalyzed by enzymes. |
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Spindle fibers are attached to the chromosome in the region of:
| 1. | Centrosome | 2. | Chromomere |
| 3. | Chromonema | 4. | Kinetochore |
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