Feature | C3 Plant | C4 Plant | |
1. | Cell type in which Calvin cycle takes place | Mesophyll cells | Bundle sheath cells |
2. | Cell type in which the initial carboxylation reaction occurs | Bundle sheath cells | Mesophyll cells |
3. | Primary carbon dioxide acceptor | RuBP | PEP |
4. | Number of carbons in the primary carbon dioxide fixation product | 5 | 3 |