Question

The C4-plants differ from C3-plants with reference to the

Answer 1

C3 plants use Calvin Cycle photosynthetic mechanism whereas C4 plants use the C4 mechanism for photosynthesis.

C3 plants produce Phosphoglyceric acid as the first stable product for dark reaction whereas C4 plants produce oxalo-acetic acid.

C3 plants have a less efficient photorespiration as compared to C4 plants.

Unlike C4 plants, C3 plants doesn't have two types of chlorophylls and Kranz anatomy in leaves.

C3 plants can fix carbon dioxide only once during the cycle whereas C4 plants fix it twice.

Answer 2

Answer:

The C4plants differ from C3 plants with reference to the substrate that accepts CO2 in carbon assimilation. In the C3 plants, CO2 is assimilated by condensing with RuBP by the help of RuBisCO enzyme to yield the first stable product, three carbon compund PGA. In C4 plants, CO2 is assimilated by condensing with PEP, by the help of PEPCase enzyme to yield the first stable product, four carbon compound OAA