Question

Write differences between $C_3$ and $C_4$ .

Answer 1

$C_3$ Plant	$C_4$ Plant
1. First stable product is phosphoglyceric acid.	1. First stable product is oxaloacetic acid.
2. Occurs in mesophyll cells.	2. Occurs in bundle sheath cell.
3. Photorespiration occurs.	3. Photorespiration does not occurs.
4. Such plants are found in temperate region.	4. Such plants found in
5. Energy required for carbon dioxide fixation is low.	5. Energy required for fixation of carbon dioxide is high.
6. Chloroplast of mesophyll cell stores starch.	6. Chloroplast of bundle sheath cell stores starch.
7. Perform photosynthesis only when stomata is open.	7. Perform photosynthesis even when stomata is close.