Q. No.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.
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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 |
| 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
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| 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 |
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| Statement I: | Both the cilium and the flagellum emerge from centriole-like structure called the basal body. |
| Statement II: | Basal body, centrioles, cilia and flagella have identical arrangement of microtubules in their ultrastructure. |
| 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. | 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 |
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| 1. | Robert Brown | 2. | Robert Hooke |
| 3. | Flemming | 4. | Rudolph Virchow |
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| 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 |
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| I: | Nuclear envelope consists of two parallel membranes with a perinuclear space between them. |
| II: | Nuclear pore is formed by the fusion of two nuclear membranes at points where they interrupt the nuclear envelope. |
| III: | Large and more numerous nucleoli are present in the cells actively carrying out protein synthesis. |
| 1. Only I | 2. Only II |
| 3. Only III | 4. None |
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