Question

Does c3 cycle takes place only after c4 cycle in c4 plants

Answer 1

Answer:

yes

Explanation:

in C4 cycle phosphoglycolate changes into 3 PGA and enter into C3 cycle

Answer 2

yes

The first stable compound produced in Calvin cycle is a 3 carbon compound namely 3 phosphoglyceric acid (PGA). Hence Calvin cycle is also called C3 cycle. 

C4 is the alternative pathway of Calvin cycle (C3 cycle) taking place during the dark phase of photosynthesis.