MCQ
In Meselson and Stahl's experiments, heavy $DNA$ was distinguished from normal $DNA$ by centrifugation in
- A$CsOH \;gradient$
- B$14 \mathrm{NH} 4 \mathrm{Cl}$
- C$15 \mathrm{NH} 4 \mathrm{Cl}$
- ✓$CsCl\; gradient$
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$R$ -The spermatids are transformed into spermatozoa by the process called spermiogenesis.