Which of the following is an incorrect statement?
1. The perinuclear space forms a barrier between the materials present inside the nucleus and that of the cytoplasm.
2. Nuclear pores act as passages for proteins and RNA molecules in both directions between nucleus and cytoplasm.
3. Mature sieve tube elements possess a conspicuous nucleus and usual cytoplasmic organelles.
4. Microbodies are present both in plant and animal cells.
The biosynthesis of ribosomal RNA occurs in :
2. Golgi apparatus
Non-membranous nucleoplasmic structures in nucleus are the site for active synthesis of
1. protein synthesis