Question

Tabulate any four differences between $C_3$ and $C_4$ plants.

Answer 1

C${}_3$ plants (any four)	C${}_4$ plants (any four)
They use Calvin cycle for dark reaction in photosynthesis.	They use Hatch-Stack cycle for dark reaction in photosynthesis.
Leaves lack Kranz anatomy.	Leaves possess Kranz anatomy.
Dark reaction is carried out by mesophyll cells.	Dark reaction is carried out by both mesophyll cells and bundle sheath cells.
Chloroplasts are monomorphic.	Chloroplasts are dimorphic.
Chloroplasts do not contain a peripheral reticulum.	Chloroplasts contain a peripheral reticulum.
Photosynthesis is inhibited when the stomata are closed.	Photosynthesis occurs even when stomata are closed.
A single carbon dioxide fixation occurs.	A double carbondioxide fixation occurs.
Carbon dioxide fixation is less efficient and slow.	Carbon dioxide fixation is more efficient and fast.
Photorespiration occurs when the carbon dioxide concentration is low	No photorespiration is observed at low carbon dioxide concentrations.
The optimum temperature range is 65-75°F	The optimum temperature range is 90-95°F
They contain a high protein content	They contain low protein content.