The stain used to visualise mitochondria is
1. Fast green
2. Safranin
3. Acetocarmine
4. Janus green
Which of the following is not a feature of the plasmids?
1. | Single – stranded | 2. | Independent replication |
3. | Circular structure | 4. | Transferable |
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Select the wrong statement.
1. | Mycoplasma is a wall-less microorganism |
2. | Bacterial cell wall is made up of peptidoglycan |
3. | Pili and fimbriae are mainly involved in motility of bacterial cells |
4. | Cyanobacteria lack flagellated cells |
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Which of the following components provides sticky character to the bacterial cell?
1. Cell wall
2. Nuclear membrane
3. plasma membrane
4. Glycocalyx
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Mitotic spindles are mainly composed of which protein?
1. | Actin | 2. | Tubulin |
3. | Actomyosin | 4. | Myoglobin |
The structure that helps in cell wall formation, DNA replication and respiration in bacteria is :
1. Mesosome
2. Chromatophores
3. Pilus
4. Nucleoid
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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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A non-membrane bound organelle found in all cells is:
1. | Centriole | 2. | Lysosome |
3. | Vacuole | 4. | Ribosome |
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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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Identify the appendage present on the surface of some bacterial cells that help attach them to rocks in streams and also to the host tissues:
1. | Flagella | 2. | Pili |
3. | Fimbriae | 4. | Cilia |
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