Everything grows old. As you age, you may notice an extra wrinkle on your forehead or lower energy levels. To find out what’s going on inside our bodies that causes these age-related changes and declines, he journal Cell assembled a group of researchers in 2013. That team, comprised of scientists studying different aspects of ageing, reviewed all the existing literature on ageing and wrote anl overview. “The Hallmarks of Ageing,” as their paper was called, summed up everything that happens in our bodies biologically as we get old, and categorized those processes into nine”hallmarks.” They are: Here’s what each of these hallmarks means and how they work. Errors appear in DNA. One type of damage that occurs with ageing is that errors start to appear in our DNA. When DNA is replicated, the code might not always be copied correctly – parts could get misspelled, and sections could be accidentally inserted or deleted. These errors are not always … [Read more...] about What causes human bodies to age? Here’s what scientists know about the biology behind growing old.
Enzymes used in dna replication
Aug 05, 7:32 AM EDT Newsletter Signup BusinessTechnologyWorldNationalMedia & CultureOpinionSportsLuxury Technology By Merlin Crossley 02/04/18 AT 10:00 AM You’ve probably read stories about new research using the gene editing technique CRISPR, also called CRISPR/Cas9. The scientific world is captivated by this revolutionary technology, since it is easier, cheaper and more efficient than previous strategies for modifying DNA.The term CRISPR/Cas9 stands for Clustered Regularly Interspaced Short Palindromic Repeats/CRISPR associated protein 9. The names reflect important features identified during its discovery, but don’t tell us much about how it works, as they were coined before anyone understood what it was.What Does CRISPR/Cas9 Do?CRISPR/Cas9 is a system found in bacteria and involved in immune defence. Bacteria use CRISPR/Cas9 to cut up the DNA of invading bacterial viruses that might otherwise kill them.Today we’ve … [Read more...] about What Is CRISPR Gene Editing, And How Does It Work?