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Q. No.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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Identify the correct statements regarding mitochondria:
1. a and b
2. c and d
3. a and c
4. b and d
| a. | Mitochondria are easily visible under the microscope without any staining. |
| b. | The number of mitochondria per cell is always fixed irrespective of the physiological activity of the cells. |
| c. | Mitochondria are the sites of aerobic respiration. |
| d. | Mitochondria divide by fission. |
1. a and b
2. c and d
3. a and c
4. b and d
Subtopic: Mitochondria |
92%
From NCERT
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Arrangement of axonemal microtubules in a eukaryotic flagellum is referred to as the:
1. 9+2 array
2. 9+0 array
3. 9+9 array
4. 9+1 array
1. 9+2 array
2. 9+0 array
3. 9+9 array
4. 9+1 array
Subtopic: Cilia & Flagella |
93%
From NCERT
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Both the cilium and the flagellum emerge from centriole-like structure called the:
1. basal body
2. kinetoplastid
3. phragmoplast
4. kinocilium
1. basal body
2. kinetoplastid
3. phragmoplast
4. kinocilium
Subtopic: Cilia & Flagella |
97%
From NCERT
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