Tag: DNA

  • Understanding Molecular Biology Part II – DNA Replication (If you missed Part I, check it out before going on to Part II below.)

    As a cell grows and gets ready to divide in two, its DNA must duplicate so that each new daughter cell receives a complete genome. To do this, the double-stranded DNA of each chromosome separates, and every single strand is copied to regenerate the double-stranded forms. This copying process requires many cellular proteins that aggregate […]

  • Understanding Molecular Biology Part I – DNA Structure and Organization

    I usually write about recent scientific publications that I find interesting and important, usually in the general area of biology. My goal is to promote scientific literacy and an awareness of the many remarkable advances in all areas of science. I try to provide some background context for the published study and then summarize the […]

  • The DNA Packing Problem

    I think everyone can relate to packing problems – how to get a cart full of groceries into the fewest bags or how to strategically organize the needed clothes and accessories into one carry-on suitcase? Packing problems abound in life from our personal needs to manufacturing concerns about how to fit the most items into […]

  • COVID-19 – Are We Nearing the Endgame?

    I suspect that everyone has heard the highly encouraging news this week from two vaccine manufacturers, Pfizer/BioNTech and Moderna. Both companies released the first phase 3 trial preliminary results this week and based on these early data each of their vaccines is highly effective after 2 doses. In the case of Pfizer’s vaccine, the initial […]

  • Human Gene Editing – Is the Future Now?

    Many human diseases are the result of genetic errors, commonly called mutations. You can think of the four nucleotides (A, C, T, and G) that comprise our DNA as the letters of our genetic alphabet with these nucleotide letters making up our genes which are the “words” of our genome. Mutations result from changes in […]

  • How Old is Your Dog Really in Human Years?

    The common metric is that each dog year equals 7 human years, but a new study suggests that the correlation is not that simple, at least for Labrador retrievers. To evaluate relative dog age, the researchers examined epigenetic changes in dog DNA and compared them with similar age-related changes in human DNA. Epigenetic changes refer […]