Kristianti, T., Widodo, A. and Suhandono, S. 2019. THE CONCEPTUAL CHANGE ASSESSMENT BASED ON ESSAY QUESTIONS IN CASE STUDY OF DNA/RNA AND INTRON TOPICS. JPPIPA (Jurnal Penelitian Pendidikan IPA). 4, 1 (Aug. 2019), 31–37. DOI:https://doi.org/10.26740/jppipa.v4n1.p31-37.