Cell is the fundamental structural and functional unit of all living organisms because:
| 1. | Anything less than a complete structure of a cell does not ensure independent living. |
| 2. | The metabolic reactions can only occur inside a living cell. |
| 3. | Nucleic acids present in the cells ensure living state. |
| 4. | The membrane bound organelles cause differentiation for proper functioning. |
Subtopic: Â Introduction to Cell |
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Subtopic: Â Introduction to Cell |
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Subtopic: Â Introduction to Cell |
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Identify the incorrectly matched pair:
| 1. | Linus Pauling | Discovered the triple helix structure of collagen |
| 2. | Rudolf Virchow | Omnis cellula-e-cellula |
| 3. | Singer and Nicholson | Fluid mosaic model |
| 4. | Georges Palade | First observed ribosome |
Subtopic: Â Introduction to Botany |Â Introduction to Cell |
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Match List I with List II:
Choose the correct answer from the options given below:
1. A - III, B - IV, C - I, D - II
2. A - III, B - I, C - IV, D - II
3. A - III, B - IV, C - II, D - I
4. A - II, B - III, C - IV, D - I
| List I | List II |
| A. Schleiden and Schwann | I. Chromatin |
| B. Rudolf Virchow | II. Nucleus |
| C. Flemming | III. Cell theory |
| D. Robert Brown | Iv. Omnis cellula-e-cellula |
1. A - III, B - IV, C - I, D - II
2. A - III, B - I, C - IV, D - II
3. A - III, B - IV, C - II, D - I
4. A - II, B - III, C - IV, D - I
Subtopic: Â Introduction to Cell |Â Cell Theory |Â Nucleus |
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Identify the correct statements:
| I. | Robert Hooke first used the word cell to name the microscopic honeycomb cavities in cork. |
| II. | Anton Von Leeuwenhoek first saw and described a living cell. |
| III. | Robert Brown discovered the nucleus. |
| IV. | George Palade first observed centrosomes in animal cells. |
| 1. | I and II only | 2. | Only I, II and III |
| 3. | Only III and IV | 4. | I, II, III and IV |
Subtopic: Â Introduction to Cell |
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Assertion(A): Cell is the fundamental structural and functional unit of all living organisms.
Reason(R): Anything less than a complete structure of a cell does not ensure independent living.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): Anything less than a complete structure of a cell does not ensure independent living.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Â Introduction to Cell |
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Assertion(A): Cells vary in their shape, size and functions based on the presence or absence of a membrane bound nucleus and other organelles.
Reason(R): A typical eukaryotic cell consists of a cell membrane, nucleus and cytoplasm.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): A typical eukaryotic cell consists of a cell membrane, nucleus and cytoplasm.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Â Introduction to Cell |
 58%
From NCERT
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Assertion (A): Cell is the fundamental structural and functional unit of all living organisms.
Reason (R): Anything less than a complete structure of a cell does not ensure independent living
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): Anything less than a complete structure of a cell does not ensure independent living
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Â Introduction to Cell |
 90%
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Assertion (A): In phase contrast microscope, living cells and tissues can be studied without staining them.
Reason (R): Electron beam is used as a source of light in phase contrast microscope.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): Electron beam is used as a source of light in phase contrast microscope.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Â Introduction to Cell |
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