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Q. No.Consider the given statements:
Statement I:
Anton von Leeuwenhoek first saw and described a live cell and Robert Brown discovered nucleus.
Statement II:
The invention of electron microscope revealed all the structural details of the cell.
1.
Statement I is correct and Statement II is incorrect
2.
Both Statement I and Statement II are correct but Statement II does not explain Statement I
3.
Both Statement I and Statement II are correct and Statement II correctly explains Statement I
4.
Only Statement II is correct
Subtopic: Cell Theory |
62%
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Cell theory, as understood today, is:
| I: | All living organisms are composed of cells and products of cells |
| II: | Cells of living organisms may or may not have cell walls |
| III: | All cells arise from pre-existing cells |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
Subtopic: Cell Theory |
66%
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A Prokaryotic cell lacks:
I: a membrane bound nucleus
II: membrane bound organelles
III: ribosomes
I: a membrane bound nucleus
II: membrane bound organelles
III: ribosomes
| 1. | Only I and II | 2. | Only I |
| 3. | Only II and III | 4. | Only III |
Subtopic: Prokaryotic Cell Organisation |
89%
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Ribosomes are:
| I: | bound by a single membrane only |
| II: | found in all cells – both eukaryotic as well as prokaryotic |
| III: | found in cytoplasm as well as chloroplasts, mitochondria and on RER |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
Subtopic: Ribosome and Inclusion Bodies |
73%
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Centrosome:
| 1. | is a non- membrane bound organelle found in all cells which helps in cell division |
| 2. | is a non- membrane bound organelle found in plant cells which helps in cell division |
| 3. | is a non- membrane bound organelle found in animal cells which helps in DNA replication |
| 4. | is a non- membrane bound organelle found in animal cells which helps in cell division |
Subtopic: Centrosomes |
82%
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Subtopic: Eukaryotic Cell Orgenelle |
82%
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Identify the incorrectly matched pair regarding shape of bacterial cells:
| 1. | Bacillus | Rod shaped |
| 2. | Coccus | Spherical |
| 3. | Vibrio | Icosahedral |
| 4. | Spirillum | Spiral |
Subtopic: Bacterial Staining & Shape |
96%
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The average size of mycoplasma ranges between:
| 1. | 0.1 to 0.3 µm | 2. | 0.02 to 0.3 µm |
| 3. | 1 to 10 µm | 4. | 1 to 2 µm |
Subtopic: Bacterial Staining & Shape |
83%
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Identify the correct statement regarding the cell envelope of a prokaryotic cell:
| I: | The outermost layer of the cell envelope is called as the glycocalyx which may be present as a loose sheath called the slime layer or a thick and tough capsule. |
| II: | The cell wall determines the shape of the cell and provides a strong structural support to prevent the bacterium from bursting or collapsing. |
| III: | Plasma membrane is selectively permeable in nature and interacts with the outside world. |
| IV: | Bacterial cells can be classified as Gram positive and Gram negative based on the staining properties of their plasma membrane. |
| 1. | All except IV | 2. | Only I and II |
| 3. | I, II, III and IV | 4. | Only II, III and IV |
Subtopic: Details of Prokaryotic Cell Structure |
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A polysome is:
| 1. | several mRNA molecules attached to a ribosome |
| 2. | several ribosomes attached to a single mRNA |
| 3. | the three major types of cellular RNAs attached to an mRNA molecule |
| 4. | many ribosomes attached to the surface of endoplasmic reticulum |
Subtopic: Ribosome and Inclusion Bodies |
89%
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