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Name two cell organelles that are double membrane bound. What are the characteristics of these two organelles? State their functions and draw labelled diagrams of both.
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- Are sausage or cylindrical-shaped organelles found in cytoplasm
- Are the sites of aerobic respiration (complete breakdown of glucose to release energy)
- Number and size varies.
- Has 2 membranes; outer membrane and inner membrane
- Inner membrane forms a number of infoldings called the cristae
- Cristae contains many enzymes required for forming ATP (storage form of energy inside a cell)
- Fluid-filled space inside the mitochondria is called the matrix
- Matrix contains a circular DNA, few RNA molecules and ribosomes (70S).
- Are also called the powerhouses of the cell (because they generate energy required for the cell and store it in the form of ATP)
- Are semi-autonomous (They have their own DNA and replicate on their own and can also synthesize most of its proteins)
- They are mainly present in the in leaf epidermal cells.
- They are cylindrical-shaped organelles
- They are the sites of photosynthesis
- They have 2 membranes; outer and inner membrane
- The fluid-filled internal space is called the stroma
- The stroma contains thylakoids which contain the pigments chlorophyll and carotenoids.
- The stroma also contains a circular DNA, few RNA molecules and ribosomes (70S).
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| Question Text | Name two cell organelles that are double membrane bound. What are the characteristics of these two organelles? State their functions and draw labelled diagrams of both. |
| Updated On | Nov 24, 2022 |
| Topic | Cell: The Unit of Life |
| Subject | Biology |
| Class | Class 11 |
| Answer Type | Text solution:1 Video solution: 1 |
| Upvotes | 150 |
| Avg. Video Duration | 16 min |
