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
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| Statement I: | In eukaryotic cells there is an extensive compartmentalization of cytoplasm. |
| Statement II: | Membrane-bound organelles are present in a Eukaryotic 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 |
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| 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 |
| 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 |
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| 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
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The organelle, involved in packaging materials, to be delivered either to intra-cellular targets or to be secreted outside the cells, is:
| 1. RER | 2. SER |
| 3. Golgi Apparatus | 4. Mitochondria |
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| Statement I: | Concentration of ions is significantly higher in the vacuole than in the cytoplasm. |
| Statement II: | In plant cells, the vacuoles occupy up to 90 % of the volume 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 |
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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.
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| 1. Lysosome | 2. Peroxisome |
| 3. Ribosome | 4. Mesosome |
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| 1. | rRNA and proteins | 2. | rRNA and carbohydrates |
| 3. | rRNa and mRNA | 4. | mRNa, tRNA and proteins |
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