Q. No.Most bacteria contain plasmids that often encode for traits that are:
1. advantageous but not essential to their bacterial host
2. advantageous and essential to their bacterial host
3. not advantageous but essential to their bacterial host
4. neither advantageous nor essential to their bacterial host
1. advantageous but not essential to their bacterial host
2. advantageous and essential to their bacterial host
3. not advantageous but essential to their bacterial host
4. neither advantageous nor essential to their bacterial host
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Mesosomes, extensions of plasma membrane into the cell, help bacterium in all the following processes except:
| 1. | Photosynthesis in cyanobacteria | 2. | Respiration |
| 3. | DNA replication | 4. | Cell wall formation |
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An important site of the formation of glycoproteins and glycolipids in a eukaryotic cell is the:
1. Rough endoplasmic reticulum
2. Smooth endoplasmic reticulum
3. Golgi apparatus
4. Lysosomes
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In animal cells, steroidal hormones are synthesized in the:
| 1. | Rough endoplasmic reticulum |
| 2. | Smooth endoplasmic reticulum |
| 3. | Golgi apparatus |
| 4. | Lysosomes |
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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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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
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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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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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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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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