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In the Hershey and Chase centrifugation, the heavier bacterial cells ended up in the:
APellet at the bottom
BSupernatant on top
CFoam at the surface
DFilter at the side
Answer & Solution
Correct answer: A. Pellet at the bottom
1. Centrifuging separates material by density.
2. The heavier bacterial cells settled down and formed a pellet.
3. The lighter phage particles stayed in the supernatant.
4. In the tube containing phage labelled with sulfur-35, the supernatant held the radioactive label and no radioactivity was detected in the pellet.
_Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 14 'DNA Structure and Function', sections 14.1-14.6_
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