What is the major issue of this paper? A) How C. elegans embryos divide? B) How germline specification is achieved? C) What is PIE-1 protein? D) Where is pie-1 mRNA is localized? E) How the EMS blastomere arise? How did the authors clone the pie-1 gene? A) Through Antibody staining B) Tc1 transposon insertion or tagging C) C. elegans lineage analysis D) They cloned the gene by pure luck E) They cloned the gene by a candidate screen What is the most important concept that you learn from reading this paper? A. The localization patterns of PIE-1 B. How pluripotency of a stem cell is maintained by a general repressor C. What kind of protein is PIE-1 D. C. elegans is a good animal model for studying embryo development E. PIE-1 associates with centrosomes during cell division How did the authors reach the conclusion that PIE-1 might be a transcriptional repressor? A. from antibody staining B. from cell lineage analysis C. from protein sequence D. it is just a wild guess E. from its interaction with other somatic-determining genes What are the important questions that the paper did not address and need to be analyzed in subsequent study? A. Whether PIE-1 is a transcription repressor B. How is PIE-1 selectively degraded in somatic daughters C. How does PIE-1 associate with centrosomes D. What are the repression targets of PIE-1 E. All of the above