Categories
Cell Biology

DNA organization inside the nucleus

Chromosomes, chromatin, nucleosomes, genes, alleles? What is the difference between these terms? What are their roles? And how are they organized inside each one of the small cells of an organism? When you hear these words, you might think that they are pretty much the same, or you may not be able to distinguish their […]

Categories
Molecular Biology

Classic experiments: DNA as the genetic material

In a previous post, we learned that DNA is the genetic material of the cells, and one of its most important functions is that it contains genes that carry the information for the determination of the hereditary characteristics. However, scientists were not always aware that DNA was the genetic material. In fact, for the first half […]

Categories
Microbiology

What is antibiotic resistance and why is it a threat to public health?

In a previous post, we talked about antibiotics and how they have helped us fight off bacterial infections since their discovery in 1928. To this day, they are used for the prevention and treatment of mild to severe infections some of whom were once dangerous or even deadly. Even though they are life-saving substances, they […]