Which of the following statements are TRUE for the plastid genomes? P. Plastid genome is circular in nature with genome size of 120-160 kb. Q. The plastid ribosomes are with sedimentation coefficient of 80 S. R. The gene for the small subunit of ribulose bisphospate carboxylase (RubisCO) is located in the plastid. S. rRNAs in the plastid genome are arranged in one transcription unit.