複選題12. Choose a right statement on Telomerase or Telomere (A) Telomerase was first observed in Tetrahymena micronuclei extracts. (B) Telomerase is a unique enzyme in that it is composed of only RNA. (C) Without telomeres, linear eukaryotic chromosomes would get shorter and shorter with each round of DNA replication (D) All organisms must protect their telomeres from nucleases and double strand break repair enzymes.