How can Identical Twins be so Different?
Identical twins will have exactly the same genome (the entire set of DNA instructions in a single cell1) as each other. So why is it that they can be so different, even in traits that have a significant genetic component? Although nature vs nurture can have something to do with this, a deeper answer lies within the recent discoveries of epigenetics. Epigenetics refers to the processes…
Why is DNA a Double Helix?
I am sure we’re all aware of the famous double helix structure, but how many of us have pondered over actually why DNA’s atoms are arranged like this? To do this, we need to pick apart the contributions to the overall free energy change (a measure of the amount of usable energy in a system1) as you go from the unfolded state (single, separate strands) to the…
Molecular Perspective 