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Q. No.Cell is the fundamental structural and functional unit of all living organisms. This statement can be best justified by the fact that:
| 1. | The cells contain nucleic acids that contain genetic information |
| 2. | A large number of organelles present in the cell perform various functions |
| 3. | Anything less than a complete structure of a cell does not ensure independent living |
| 4. | All multi-cellular organisms begin their life as a single celled zygote |
Subtopic: Introduction to Cell | Cell Organisation |
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In 1665, Robert Hooke watched cork under his microscope and sketched his findings as given in the figure. This was the discovery of cell, a very important landmark in the development of cell theory contributed by various scientists. Identify the correctly matched contributions of scientists in the formulation of the cell theory:
| A. | Anton Von Leeuwenhoek | The first man to witness a live cell under a microscope |
| B. | Schleiden and Schwann | Proposed cell theory |
| C. | Rudolph Virchow | Proposed spontaneous generation of life |
| 1. | Only A and B | 2. | Only A and C |
| 3. | Only B and C | 4. | A, B and C |
Subtopic: Introduction to Cell |
71%
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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. |
Subtopic: Introduction to Cell |
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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 |
63%
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Who concluded, based on his studies on plant tissues, that the presence of cell wall is a unique character of plant cells?
| 1. | Matthias Shcleiden | 2. | Theodor Schwann |
| 3. | J. B. S. Haldane | 4. | Rudolph Virchow |
Subtopic: Cell Theory |
71%
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The famous aphorism ‘omniscellula-e-cellula’ was added to the cell theory in 1855 by
| 1. | Matthias Shcleiden | 2. | Theodor Schwann |
| 3. | J. B. S. Haldane | 4. | Rudolph Virchow |
Subtopic: Introduction to Cell |
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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 |
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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 |
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Identify the correct statement regarding the given diagram:
| I: | It shows a polysome. |
| II: | All ribosomes will be translating the same protein. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Ribosome and Inclusion Bodies |
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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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