biology help

Briefly describe the structure and function of three different cellular systems that combine proteins along with necessary RNAs to catalyze covalent bond formation and/or hydrolysis reactions (i.e., function as ribozymes)?

What is the ploidy (haploid/diploid) level and how many sister chromatids are there in your own cells during anphase I, anaphase II, and telophase II (includes cytokinesis)?

What do multicellular genomes spend a larger proportion of their sequences on (in terms of enhanced complexity)?

what happens to the UTR during RNA processing?