Q. No.Centrosome:
1.
is a non- membrane bound organelle found in all cells which helps in cell division
2.
is a non- membrane bound organelle found in plant cells which helps in cell division
3.
is a non- membrane bound organelle found in animal cells which helps in DNA replication
4.
is a non- membrane bound organelle found in animal cells which helps in cell division
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| 1. | Bacillus | Rod shaped |
| 2. | Coccus | Spherical |
| 3. | Vibrio | Icosahedral |
| 4. | Spirillum | Spiral |
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1. a single chromosome and circular DNA
2. multiple chromosomes and circular DNA
3. a single chromosome and linear DNA
4. multiple chromosomes and liner DNA
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I. The outermost layer of the cell envelope is called as the glycocalyx which may be present as a loose sheath called the slime layer or a thick and tough capsule.
II. The cell wall determines the shape of the cell and provides a strong structural support to prevent the bacterium from bursting or collapsing.
III. Plasma membrane is selectively permeable in nature and interacts with the outside world.
IV. Bacterial cells can be classified as Gram positive and Gram negative based on the staining properties of their plasma membrane.
| 1. | All except IV | 2. | Only I and II |
| 3. | I, II, III and IV | 4. | Only II, III and IV |
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| 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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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.
1. both I and II are correct
2. only I is correct
3. only II is correct
4. Both I and II are incorrect
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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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