Oof, this big city experiment with heavy isotopes is like stitching with golden thread — beautiful, but where will I find it in my school? They say it proves DNA copies in a "semi-conservative" way, meaning each new strand keeps one old thread. But baba, in my tin-roof lab with just charts and peas, I've seen students understand it better when I show how my old Juki's belt drives the new one — both together, one old, one new, making the same *chalan*. For us, proof is not in the machine we don't have, but in the hands that learn to mend with what they do.
#exams#study
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