| A | B | |
| 1. | SER | RER | 
| 2. | RER | SER | 
| 3. | RER | Golgi apparatus | 
| 4. | SER | Golgi apparatus | 
| 1. | 1 | 2. | 2 | 
| 3. | 3 | 4. | 4 | 
| 1. | 2 | 2. | 4 | 
| 3. | 5 | 4. | 3 | 
| 1. | 1 | 2. | 2 | 
| 3. | 3 | 4. | 4 | 
| I: | ‘A’ links a pair of sister chromatids together during cell division. | 
| II: | ‘B’ is a disc-shaped protein structure associated with duplicated chromatids in eukaryotic cells where the spindle fibers attach during cell division to pull sister chromatids apart. | 
| 1. | vesicles | 2. | ribosomes | 
| 3. | nucleoid | 4. | the plasma membrane | 
| 1. | SER | 2. | Mitochondria | 
| 3. | Chloroplasts | 4. | Vacuoles | 
| 1. | Chromoplasts | 2. | Amyloplasts | 
| 3. | Elaioplasts | 4. | Aleuroplasts |