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Q. No.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 |
82%
Level 1: 80%+
Hints
Identify the correct statement(s) regarding the structure of a typical cell membrane:
| I: | The lipid component mainly consists of phosphoglycerides. |
| II: | Peripheral proteins are either lying on the surface of the membrane or partially buried in it. |
| III: | Carbohydrates are not a component of cell membrane. |
| IV: | Cholesterol is a lipid and is a part of the cell membranes of animal cells. |
| 1. | Only I | 2. | II and III only |
| 3. | I and IV only | 4. | II and IV only |
Subtopic: Cell Membrane |
57%
Level 3: 35%-60%
Hints
The middle lamella of a typical plant cell:
| I: | mainly consists of calcium carbonate |
| II: | holds or glues the different neighbouring cells together |
| III: | is not traversed by plasmodesmata |
| 1. | Only II is correct |
| 2. | Only I is incorrect |
| 3. | I, II and III are incorrect |
| 4. | Only II and III are correct |
Subtopic: Cell Wall |
66%
Level 2: 60%+
Hints
The endoplasmic reticulum:
1. both I and II are correct
2. only I is correct
3. only II is correct
4. Both I and II are incorrect
| I: | divides the intracellular space into a luminal compartment and an extra-luminal [cytoplasm] compartment. |
| II: | is called as rough ER if it shows ribosomes attached to its inner surface. |
2. only I is correct
3. only II is correct
4. Both I and II are incorrect
Subtopic: Endomembrane System (Endoplasmic Reticulum) |
56%
Level 3: 35%-60%
Hints
Identify the incorrect statement regarding mitochondria:
| 1. | The number of mitochondria per cell is same in all the cells of human body. |
| 2. | The inner membrane forms a number of infoldings called the cristae towards the matrix. |
| 3. | They divide by binary fission. |
| 4. | They are called as ‘power houses’ of the cell. |
Subtopic: Mitochondria |
88%
Level 1: 80%+
Hints
George Palade was the first scientist to observe:
| 1. | Lysosome | 2. | Peroxisome |
| 3. | Ribosome | 4. | Mesosome |
Subtopic: Ribosome and Inclusion Bodies |
88%
Level 1: 80%+
Hints
The given diagram:
1. Both I and II are correct
2. only I is correct
3. only II is correct
4. Both I and II are incorrect
| I: | shows the diagrammatic representation of the ultra-structure of centriole |
| II: | shows the 9 + 2 arrangement of the axonemal microtubules of cilia/flagella |
2. only I is correct
3. only II is correct
4. Both I and II are incorrect
Subtopic: Cilia & Flagella |
64%
Level 2: 60%+
Hints
The prokaryotic cells:
| 1. | do not possess flagella |
| 2. | possess flagella that are structurally similar to that of the eukaryotic flagella |
| 3. | possess flagella that are structurally different from that of the eukaryotic flagella |
| 4. | possess flagella made of tubulin protein and microtubules |
Subtopic: Eukaryotic Cell Orgenelle |
70%
Level 2: 60%+
Hints
Identify the incorrect statement regarding centrosome:
| 1. | it usually contains two cylindrical structures called centrioles |
| 2. | both centrioles in centrosome are parallel to each other |
| 3. | in centrioles, the peripheral fibril is a triplet |
| 4. | the central part of the proximal region of the centriole is a proteinaceous hub |
Subtopic: Centrosomes |
79%
Level 2: 60%+
Hints
Consider the two statements:
| I: | The content of nucleolus is continuous with the rest of the nucleoplasm. |
| II: | Nucleolus is the site for active ribosomal RNA synthesis. |
| 1. | I is correct and II is incorrect |
| 2. | Both I and II are correct but II does not explain I |
| 3. | Both I and II are correct and II correctly explains I |
| 4. | Only II is correct |
Subtopic: Nucleus |
74%
Level 2: 60%+
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