• (2016) Difference Between A DNA, B DNA, and Z DNA by Shomu’s Biology; YouTube
https://www.youtube.com/watch?v=oUwMeiAbUzs
• (2019) Nitrogenous Bases – Definition and Structures by Anne Marie Helmenstine, Ph.D.; thoughtco.com
https://www.thoughtco.com/nitrogenous-bases-definition-and-structures-4121327
• Difference Between Prokaryotic and Eukaryotic DNA; byjus.com
https://byjus.com/biology/difference-between-prokaryotic-and-eukaryotic-dna/
• Nuclear DNA v. mtDNA: Principles of Inheritance; University of Cambridge
http://www.mrc-mbu.cam.ac.uk/sites/default/files/poster-principles.pdf