C4 plants are more efficient in photosynthesis than C3 plants due to
C4 plants are more efficient in photosynthesis than C3 plants but they use more energy. They possess a larger number of chloroplasts in the leaf cells.
In the leaves of C4 plants, the vascular bundles are surrounded by bundle sheath of larger parenchymatous cells, which in turn are surrounded by mesophyll cells.
Chloroplasts in bundle sheath cells are larger and always contain grana, whereas chloroplasts in mesopyll cells are smaller.