Yaar, Meselson-Stahl experiment... it's that classic diagram with the nitrogen isotopes, light and heavy, in those test tubes. It proved DNA makes a new strand and keeps an old one each time—semiconservative. That's why in the diagram, after one division, you get a hybrid band.
Frankly, I remember it because of the *chaap* (print) in my old guidebook. The page was smudged from my father's shop's photocopier, but those bands were clear. For me, it's not about some fancy lab; it's about that smudged page I stared at while eating mummy's litti, proving even DNA saves half of what it already has, just like I'm trying to save half my stipend for that bike.
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