Describe5 marksChallenge
The table below provides descriptions of five structures found in eukaryotic cells. For each structure (A–E), identify the organelle or cell structure and describe its function.
| Structure | Description |
|---|---|
| A | A double-membrane bound organelle found in all eukaryotic cells. It contains small circular DNA molecules and 70S ribosomes. The inner membrane is folded into cristae. |
| B | A double-membrane bound organelle found in plant cells. It contains small circular DNA molecules and 70S ribosomes. It contains thylakoid membranes where light-dependent reactions occur. |
| C | A network of membrane-bound tubes and sacs continuous with the nuclear envelope. The outer surface is studded with 80S ribosomes. |
| D | A non-membrane bound structure composed of RNA and proteins, located within the nucleus. |
| E | A small cylindrical organelle found in animal cells, composed of a ring of nine triplets of microtubules. |