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Q. No.In the sectional view of chloroplast shown below, the location of enzymes required for the synthesis of carbohydrates and proteins, is shown by the letter:
1. A
2. B
3. C
4. D
Subtopic: Plastids |
78%
From NCERT
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In Amoeba, contractile vacuoles:
| 1. | contains water, sap, excretory product and other materials not useful for the cell. |
| 2. | store enzymes capable of digesting carbohydrates, proteins, lipids and nucleic acids. |
| 3. | are formed by engulfing the food particles. |
| 4. | are important for osmoregulation and excretion. |
Subtopic: Vacuole |
72%
From NCERT
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Consider the given two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is correct; Statement II is incorrect
| Statement I: | Mature sieve tube elements of vascular plants and mature human erythrocytes are not considered as ‘living’ cells. |
| Statement II: | Mature sieve tube elements of vascular plants and mature human erythrocytes lack a nucleus. |
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is correct; Statement II is incorrect
Subtopic: Nucleus |
69%
From NCERT
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The arrangement of axonemal microtubules in cilia and flagellum is referred to as 9 + 2 array which essentially means that the axoneme has:
| 1. | nine doublets of radially arranged peripheral microtubules and two doublets of centrally located microtubules enclosed by a central sheath. |
| 2. | nine triplets of radially arranged peripheral microtubules and a pair of centrally located microtubules enclosed by a central sheath. |
| 3. | nine triplets of radially arranged peripheral microtubules and a centrally located protein hub not enclosed by a central sheath. |
| 4. | nine doublets of radially arranged peripheral microtubules and a pair of centrally located microtubules enclosed by a central sheath. |
Subtopic: Cilia & Flagella |
69%
From NCERT
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Identify the correctly matched pairs:
| I: | Anton Von Leeuwenhoek | first saw and described a live cell |
| II: | Robert Brown | discovered the nucleus |
| III: | Matthias Schleiden | was a German zoologist |
| IV: | Theodor Schwann | was a British botanist |
1. Only I and II
2. Only I and III
3. I, II, III and IV
4. Only III and IV
Subtopic: Introduction to Cell | Cell Theory |
83%
From NCERT
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Unicellular organisms are capable of:
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I: | independent existence |
| II: | performing the essential functions of life |
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Introduction to Cell |
96%
From NCERT
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The prokaryotic cells are represented by all the following except:
1. yeast
2. bacteria
3. blue-green algae
4. mycoplasma
1. yeast
2. bacteria
3. blue-green algae
4. mycoplasma
Subtopic: Prokaryotic Cell Organisation | Details of Prokaryotic Cell Structure |
88%
From NCERT
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Eukaryotic cells differ from prokaryotic cells in all the following features except:
1. Extensive compartmentalisation of cytoplasm.
2. The presence of membrane bound organelles.
3. An organised nucleus with a nuclear envelope.
4. Genetic material organised into chromosomes.
1. Extensive compartmentalisation of cytoplasm.
2. The presence of membrane bound organelles.
3. An organised nucleus with a nuclear envelope.
4. Genetic material organised into chromosomes.
Subtopic: Introduction to Cell | Cell Organisation |
62%
From NCERT
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The number of correct statements regarding the structure of a typical animal cell membrane is:
1. 2
2. 3
3. 4
4. 5
| I: | It is mainly composed of lipids and proteins. |
| II: | The major lipids are phospholipids, that are arranged in a bilayer. |
| III: | The lipids are arranged within the membrane with the hydrophobic head towards the outer sides and the polar tails towards the inner part. |
| IV: | In addition to phospholipids, membrane also contains cholesterol. |
| V: | Peripheral proteins lie on the surface of membrane while the integral proteins are partially or totally buried in the membrane |
1. 2
2. 3
3. 4
4. 5
Subtopic: Cell Membrane |
76%
From NCERT
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Which of the following will be applicable to the description of smooth endoplasmic reticulum?
| a. | Frequently observed in the cells actively involved in protein synthesis and secretion |
| b. | Extensive and continuous with the outer membrane of the nucleus |
| c. | The major site for synthesis of lipid |
| d. | Synthesis of lipid-like steroidal hormones in animal cells |
| 1. | a and b | 2. | c and d |
| 3. | a and c | 4. | b and d |
Subtopic: Intro to Endomembrane System: Endoplasmic Reticulum | Endomembrane System (Endoplasmic Reticulum) |
92%
From NCERT
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